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1,097,500 | Browsable Disk Not Shown in Win10 Explorer | Out of ideas myself so hoping someone has seen this or can throw ideas at it. I have a Win10PRO x64 21H1 with latest monthly updates installed C, D, E, F Drives - all Internal F Drive not shown in "This PC" or down the side bar - it was until 1 week ago appx. Entering F:\ in address bar works Can browse Disk Applicatio... | It is possible to hide drives in Explorer: https://support.microsoft.com/en-us/topic/hide-physical-drives-in-windows-explorer-25e8ddaf-b6d4-e5ac-5342-ff22eaefb2f1 So, check that the corresponding registry value is not set on your computer: [CODE] | 0 | 0 | 46 | 2022-03-31T17:51:16.883 | infrastructure | serverfault.com | |
118,158 | Having problems replicating the results of a series of N LASSOs fit to N datasets in R | I have fit n LASSO Regressions on n different data sets (the 'datasets' object is an R list of length n where each element is a data.table which is a light and fast data frame from the data.table package) using the enet() function from the elastic net package in R using the code below: [CODE] I have then determined whi... | You have made a single typo within the "alpha" argument in your glmnet function, and that appears to be the root cause of why it fails to faithfully reproduce the selections made by the enet version you use here. You have this argument set equal to 0, but it ought be set equal to 1 instead. It would look like this afte... | 0 | 0 | 65 | 2023-01-30T17:49:05.720 | database_errors | datascience.stackexchange.com | |
267,156 | GROUPING SETS returning unexpected results with calculated expression | Here we have two similar queries using [CODE] where the [CODE] clause contains some expressions calculated in aggregation: [CODE] it's plan is here: first query plan and [CODE] the corresponding plan is here: second query plan Both the queries first calculate some expression for aggregation, [CODE] in the first case an... | I'm going to use a simpler example where it is clear to see what the expected results are. [CODE] Query 1 [CODE] Query 1 Results [CODE] Query 2 [CODE] Query 2 Results Despite the [CODE] and the fact that [CODE] sorts first in SQL Server the rows with [CODE] as [CODE] are ordered last. [CODE] Query 1 and 2 should return... | 8 | 12 | 432 | 2020-05-14T18:01:59.467 | database_errors | dba.stackexchange.com | |
718,029 | Nginx load balancer shows wrong site on failover server | I have five websites and I have three servers, all running nginx. Primary server Load balancer Failover server Each website has it's own primary server but they all share the same failover server. My load balancer is set to send all traffic to each website's primary server. Only if that primary server goes down will th... | It looks like I found out the answer to this. I needed to add the line proxy_set_header Host $host; right under the proxy_pass lines on my load balancer config files. | 1 | 0 | 219 | 2015-08-31T14:50:07.563 | database_errors | serverfault.com | |
32,812 | Categorization of approaches to deal with imbalanced classes | What is the best way to categorize the approaches which have been developed to deal with imbalance class problem? This article categorizes them into: Preprocessing: includes oversampling, undersampling and hybrid methods, Cost-sensitive learning: includes direct methods and meta-learning which the latter further divide... | The way I see it all three categorizations agree in many things. For example, all three have a category for pre-processing steps. I would tend to mostly agree on the third categorization as its more generic and encompasses more things. The data-level category includes any pre-processing steps dealing with class imbalan... | 8 | 5 | 294 | 2018-06-08T05:10:45.573 | data_quality | datascience.stackexchange.com | |
112,632 | Secure to install DHCP and gateway services on the same machine? | What considerations would you have when deciding on installing the DCHP services onto a machine currently serving in the gateway role. What issues/concerns/considerations would you have in this scenario. Cost isn't the concern, but rather security, maintainability. Anything else? | Running a DHCP service on your gateway is not insecure, in itself. But it's also not the most secure option, either. Any network service can potentially lead to a compromise, if the service has a security vulnerability, or isn't properly configured. The added risk would be pretty small if you take some basic security p... | 3 | 3 | 107 | 2010-02-14T00:07:18.903 | infrastructure | serverfault.com | |
1,030,496 | Initialize TPM virtual smart card in Google Cloud VM running Windows Server | After setting up a Windows Server with a vTPM (see https://cloud.google.com/blog/products/gcp/security-in-plaintext-use-shielded-vms-to-harden-your-gcp-workloads ) in Google Cloud VM and accesing to it through Remote Desktop Services (RDS), when trying to initialize the TPM virtual smart card with a command like the fo... | You can use the Emergency Management Services (EMS) console which once connected, will present you with a Command Prompt. From your terminal or in Cloud Shell, enable connections to the serial ports on your VM: [CODE] Replacing [CODE] with the name of the VM on which to enable the serial ports. Connect to the EMS conso... | 0 | 3 | 682 | 2020-08-17T19:48:02.663 | infrastructure | serverfault.com | |
93,961 | Training is not stable with extreme class imbalance | I'm dealing with a multi-class classification problem with around 30 categories. This problem has a severe class imbalance: Around 300 examples for the least common class. Around 100k examples for the most common class. I don't want the classification model to be dummy and predict the most common class for most of the ... | There are probably many different strategies but it's a difficult problem when the imbalance is as severe as it is here. Without any correction the model is likely to ignore the smallest classes, as you noticed. However forcing the class weight as if the data is balanced is certainly too strong a correction. A middle g... | 2 | 1 | 182 | 2021-05-04T10:54:40.120 | data_quality | datascience.stackexchange.com | |
97,115 | Hyperparameter searching when there is no development set | I have a train and a test set and no development (dev) set. I'm training a model on the train set and searching for the best hyperparameters that can eventually maximize the accuracy of the test set (pretty much a normal machine learning scenario). Here is my confusion: we usually do the hyperparameter tuning on the de... | This is very nearly a duplicate of Is a test set necessary after cross validation on training set? , but I think it's worth addressing specifically this part of your question: the hyperparameter searching is like every time training a model from scratch using a combination of hyperparameters and pick the best combinati... | 1 | 1 | 49 | 2021-06-25T20:15:04.180 | data_quality | datascience.stackexchange.com | |
173,646 | MySQL 5.7 SELECT and INSERT deadlocking | I'm trying to solve a deadlocking issue that happens with some automated jobs kicked off via an ETL job (through Pentaho) and separately through Looker. As a result, we have some, but not tons of control over the timing and connection settings of the queries. I think I read elsewhere on Stackoverflow about INSERT deadl... | One way to try to avoid deadlocks is to speed up queries. If you don't need [CODE] , remove it. This might provide a more efficient way to handle [CODE] . If the flags are 0/1, then do [CODE] instead of [CODE] ; this may be easier to optimize. What indexes do you have on each table? (Please provide [CODE] .) The most c... | 0 | 1 | 947 | 2017-05-16T00:18:19.520 | bi_errors | dba.stackexchange.com | |
976,715 | shibd daemon 'timeout' on systemctl start | I have a server that uses the shibboleth2 shibd daemon to allow remote authentication to a database. The daemon reads a very large federation metadata file on starting/reloading (circa 34MB). This needs several minutes to process. Previously it completed within the systemctl timeout limit of 90 seconds. It is noe excee... | And excellent post explaining the process to extend the timeout is provided here: https://unix.stackexchange.com/questions/227017/how-to-change-systemd-service-timeout-value/276785#276785 | 0 | 1 | 710 | 2019-07-25T16:54:23.550 | api_errors | serverfault.com | |
751,634 | Can't receive mail with dovecot + postfix setup | First time setting up my own mail server on a machine running the latest Ubuntu After looking around i decided on dovecot + postfix and Virtual users with mailboxes in /var/mail/vmail/%d/%n For the most part, i followed the Taking back email tutorial series found here I noticed that when i try to connect via IMAP to me... | First your [CODE] is both wrong and wrongly specified. In dovecot.conf you set it to [CODE] so in Postfix that should be [CODE] (not [CODE] ). Notice how this is a relative path, relative to Postfix's chroot dir. Restart Postfix and the SASL errors should be gone. Second, it looks like you are mixing virtual mail hosti... | 3 | 5 | 3,624 | 2016-01-25T18:16:28.753 | api_errors | serverfault.com | |
24,681 | Minimum/Maximum Server Memory in SQL Server 2005 with /3GB and /Userva switches | I have a 32-Bit Windows 2003 machine with 3.75GB RAM running one SQL Server 2005 instance. I am trying to optimize memory. If I use the switches in boot.ini like below, [CODE] should I set the min and max server memory on the SQL Server instance to that 2490, or less than that? (2490 = 3840MB available - 1350MB for Win... | I suppose the real question here is "what are you trying to solve". At best you are only going to get a few hundred extra MB into your buffer pool. If you are doing this to solve a performance problem then you should make certain your problem is related to memory and not something else, like network. Are you running Wi... | 2 | 2 | 417 | 2012-09-21T14:17:49.680 | database_errors | dba.stackexchange.com | |
228,647 | Error with pg_upgrade and PostGIS | I have a PostgreSQL 9.2 setup (with Postgis) and am trying to upgrade it to 9.6. When performing the pg_upgrade, I get the following error: [CODE] I've tried to upgrade [CODE] on my 9.2 clusters, but I get an error as well: [CODE] How should I proceed? | How should I proceed? I would try to load the newer version of PostGIS fresh on a 9.6 before you load your dataset. If successful, I would edit the dataset to remove anything to do with PostGIS's internal functions. I would then load my dataset without those offending functions (make sure whatever you're loading does n... | 0 | 0 | 423 | 2019-02-01T06:15:58.507 | database_errors | dba.stackexchange.com | |
275,524 | Are recent versions of Oracle able to implement a queue with SKIP LOCKED? | My question: what is the very latest status on whether or not recent versions of Oracle actually make it possible to implement a queue in a straightforward way with SKIP LOCKED and limiting to a single row, without resorting to indirect solutions/fragile solutions? There seems to be alot of history going back a long ti... | it's not clear what problem you think there is The problem is that you rely on non-deterministic behaviour (which, by being non-deterministic, is bound to change at any time). SQL is a declarative language. It does not define how you want to achieve something; it only defines what you want to achieve. Let's see what yo... | 0 | 3 | 302 | 2020-09-14T23:18:50.513 | database_errors | dba.stackexchange.com | |
124,251 | Does a webapp need a connection monitoring feature? | I developing a client using Flex and ActionScript that is run in the browser and communicates with our server backend. There has been concern that the application "needs" to have a graphic indicator to show whether the client has a connection to the server or not. Part of the problem of this requirement is that is comi... | Having developed this feature for an AIR app (using URLMonitor ) I think it is a worthwhile feature to add, though I can see where you are coming from. What we did for our connection monitor is create a script on the server that the client app can ping for a response at some set interval (say, once every 10 seconds). B... | 0 | 1 | 188 | 2011-12-09T17:13:43.680 | pipeline_ops | softwareengineering.stackexchange.com | |
44,222 | How do I fix ssh on a mac | (not sure if questions about SSH should go on SO or SF) Running a Macbook with OS 10.5. SSH seems to be broken even checking the version gives me this error: $ ssh -v /usr/bin/ssh: line 1: -----BEGIN: command not found /usr/bin/ssh: line 2: MIIEowIBAAKCAQEA66pW3MldpOnUWFX+3xLKF8WFKViMDbPC/A7c8hv69DeFgnM/: No such file ... | Your ssh config may be broken, but I doubt ssh itself is at fault. First question: Are you really running ssh? It almost looks like the shell is trying to execute a public key that's had its x bit set... $ which ssh $ file $(which ssh) You should see something like this: mojito:~ insyte$ which ssh /usr/bin/ssh mojito:~... | 2 | 4 | 14,189 | 2009-07-22T19:09:16.830 | infrastructure | serverfault.com | |
436,113 | Can't start eth1 and dhcp on debian wheezy | What I want: eth0 is connected to internet and has a static IP-address. eth1 connected to internal network and be a dhcp server for subnet. But I can't get eth1 to work. Error: [CODE] ifconfig -a [CODE] Configuration file: /etc/network/interfaces [CODE] /etc/default/isc-dhcp-server [CODE] /etc/dhcp/dhcpd.conf [CODE] | [CODE] Also note that ifconfig is deprecated since 1999, use [CODE] instead (ifupdown is not deprected through). ifupdown has this little problem that it cannot detect " invalid " options because these options are passed as environment variables and there is no way to tell if a ifupdown helper script uses a certain env... | 3 | 4 | 19,141 | 2012-10-08T19:25:39.747 | infrastructure | serverfault.com | |
593,444 | What can I do to fix missing start menu/desktop icons for a domain user? | I'm having a problem with one user account in my domain. The domain controller is Server 2008 R2, with Win7 clients. The user's password expired, so she went through the process of changing it. We have group policy set up to require a complex password with at least 8 characters. She said that she filled in all of the b... | Her profile is corrupt, period. How it happened is a bit of an interesting mystery, but the fix is the same. Delete/recreate her profile and copy all of her stuff back over. My guess is that somehow the winlogon process got really confused somehow and set her profile directories (desktop, start menu, etc.) to the All U... | 6 | 1 | 6,859 | 2014-05-06T16:45:10.713 | infrastructure | serverfault.com | |
400,737 | Headless CMS and business logic | The company I work for wants to move from their current CMS (very expensive and developed and maintained by an external company) to a new one, possibly open source or for a lower price. My colleagues and I are looking at headless CMS and the options on the table, for now, push us to 2 possible solutions: strapi and gra... | You're not over-complicating it, this is how headless CMS work once you go from sales pitch to use. Their APIs are not aware of your user model, their rate limits (in case of SaaS) are too low, and the data model that is convenient for content editing is usually not convenient for data retrieval. Bite the bullet and cr... | 4 | 2 | 793 | 2019-11-07T17:20:53.723 | pipeline_ops | softwareengineering.stackexchange.com | |
904,474 | VPN from AWS Workspace | I have recently created a Win10 AWS WorkSpace and I want to connect from there to my public VPN server. I am using the same settings as on my home internet but in AWS the connections times out. Is something network related that prevents the L2TP or PPTP VPN connections. Can I configure or setup additional network setti... | I faced the same problem. The issue was the "Amazon WorkSpaces Security Group" created on the VPC for the workspace. Check the outbound rule, it's allowing custom, even with 0.0.0.0/0 still blocking. I changed to Anywhere-ipv4 and saved. It worked for me. | 1 | 0 | 2,081 | 2018-03-25T10:52:21.720 | infrastructure | serverfault.com | |
814,393 | Running VCC-compiler failed | Whenever I am running the command sudo service varnish restart it shows the following message [CODE] Message from VCC-compiler: [CODE] my default.vcl file is [CODE] | You have a syntax error in your configuration file. You need to fix that. [CODE] means that the error is in line 11 of the configuration file (using a editor which displays line numbers can be very useful): [CODE] Seems that at line [CODE] somebody is trying to define a VCL subroutine within a backend specification, wh... | 2 | 3 | 6,335 | 2016-11-11T11:27:03.937 | infrastructure | serverfault.com | |
186,154 | Connecting with SMB from Mac to Windows server | I'm trying to connect from my Mac to a directory on a Windows server. Here is what I'm doing from the finder : menu [CODE] I get an error (error code -36). But, from the finder window, if I click on [CODE] , I have access to the directory. I don't understand why I cannot connect straight to [CODE] . | Are you using different or saved credentials when using the file share than your own? ( http://support.apple.com/kb/TA20949?viewlocale=en_US ) Are there any error messages showing up in the logs? What version OS X and Windows are being used? And with or without active directory? | 0 | 1 | 2,344 | 2010-09-30T10:31:45.697 | infrastructure | serverfault.com | |
15,485 | Licensing of Windows in backed-up virtual machines | Possible Duplicate: Can you help me with my software licensing question? If I have a development environment running in (for example) three VMWare virtual machines, each one containing a Windows installation, then I need three Windows licenses. If I simply copy the files containing my three virtual machines to make a b... | You do not need licenses for those. They are not backups, but they are still 'inactive'. From the VMWare licensing faq : Q. What about licenses for OS instances in inactive or stored virtual machines? A: Customers only pay for active and running OS instances. Instances of applicable operating systems that are stored in... | 4 | 5 | 454 | 2009-05-30T08:52:19.053 | data_quality | serverfault.com | |
177,373 | esata cable damaged? | NOTES: I have two Sans Digital TowerRIAD they van been configured the same even the hard drives in each are the same model. This issue below has happened 3 times in 7 months. Windows 7 TROUBLESHOOTING: Restarted computer. --NEXT-- RIAD 1(Still NOT working) RAID 2(Still working) --NEXT-- RIAD 1(swap esata cables from RA... | Yes they can. Both by physical handling as without it. Moisture, thermal expansion stress, vibrations, dust etc. It could even be mechanical tolerances: a connector can work fine in one slot and not in another. The annoying thing it may not show up immediately or in a reproducible fasion. I've had a drive cage fail ran... | 3 | 5 | 196 | 2010-09-02T15:04:43.943 | infrastructure | serverfault.com | |
11,634 | SQL Job in idle state | A created a new SQL Job in SQl Server Agent. I followed the steps mentioned in the article http://msdn.microsoft.com/en-us/library/ms187910.aspx Still it is in idle state. PLease note that the schedular is prepared to execute every 10 seconds. Below is the Drop and create script [CODE] | As far as I can see your schedule is set to execute between midnight (12:00AM) to noon (12:00PM), i.e. your job will not execute in the afternoon and evening. Change your ending time to 11:59:59PM and it should run all day. | 2 | 2 | 3,005 | 2012-01-26T08:08:24.633 | database_errors | dba.stackexchange.com | |
30,295 | Is there are way to impute missing values by clustering, regression and stochastic regression | I'd like to know if there are any libraries that allow imputation by clustering , regression and stochastic regression . So far, I've done imputation by mean, median and KNN. I'm trying to evaluate the best imputation method for an small dataset (Iris in this case). I had to delibrately create NaN values since Iris set... | Scikit-learn has an [CODE] module that supports many of those imputation methods. | 1 | 0 | 633 | 2018-04-14T02:19:32.127 | data_quality | datascience.stackexchange.com | |
65,334 | Graph isn't an attribute in TensorFlow? Very basic question | Hi am am just starting to learn how to use TensorFlow and this is one of my first projects. I am simply trying to create a graph. This is my code: [CODE] I cannot seem to create a Graph. The compiler threw an AttributeError (not exactly sure what that is)... [CODE] The compiler said the issue was with line two in creat... | 2 options. reinstall and try again (dont ask) option b) downgrade to versions 1.13.1 and lower (again dont ask) ofcourse you can ask I am just lazy | 1 | 0 | 708 | 2019-12-23T15:22:41.123 | data_quality | datascience.stackexchange.com | |
721,299 | Tomcat and Apache webserver on same machine | I need to install ODK Aggregate on my CentOS 6 Server which is already running Apache HTTP on both 80 and 443 (80 is redirecting to 443 to force secure connection). I was reading ODK and it require Tomcat 6. I read here and on StackOverflow that this two don't run at the same time without tweaking some config. I've nev... | Running Apache and Tomcat on the same computer is no problem. It's pretty common to run Tomcat on port 8080, run Apache on port 80/443, and use mod_proxy to allow Apache to serve apps hosted by Tomcat. You might set up Apache so that any requests going to /app on port 80 get proxied to localhost:8080/app, which is Tomc... | 0 | 4 | 4,673 | 2015-09-09T19:40:51.243 | database_errors | serverfault.com | |
409,812 | Running python app in the background on linux | Weird question here, but I'm playing with a python chat server/client combo on my Linux server. Currently, if I do this: [CODE] This starts the python app run loop and the server listens for incoming TCP connections. My problem is, if I close my terminal window, the ssh session quits and the python app stops running, a... | You can use [CODE] [CODE] will log your program output to [CODE] file. To stop your program you have to use [CODE] command. | 5 | 8 | 25,066 | 2012-07-21T01:42:58.523 | infrastructure | serverfault.com | |
180,165 | Importing a .bacpac from SQL Azure into a local SQL Server 2016 server gives errors | I'm trying to import a .bacpac created from SQL Azure into a SQL Server 2016 server that has no existing databases beforehand. It will run but run into issues such as: Unhandled Exception: Microsoft.SqlServer.Dac.Data.DataException: Data plan execution failed with message One or more errors occurred. ---> System.Aggreg... | Please download the latest version of SSMS to import the dacpac. Download it from here . Hope this helps. Regards, Alberto Morillo | 0 | 0 | 752 | 2017-07-18T20:09:29.720 | data_quality | dba.stackexchange.com | |
634,568 | Is there a way to allow acess to an specific device that is out of my network? | I’m trying to allow my mobile device to connect from everywhere, Wi-Fi or not to an specific port of my Linux server which is running a [CODE] service. I’m using [CODE] to set some rules to which IP addresses can connect to that port for example my house. I don’t what any other device or IP to connect to my server's [C... | You have a few options: You can use SSH to either set up a tunnel or a SOCKS proxy . You can set up a VPN service on your router and configure your mobile device to sign into the VPN, giving you access to your private network. You can set up a reverse proxy and set up authentication through it, using either password or... | 0 | 5 | 307 | 2014-10-08T21:31:42.733 | infrastructure | serverfault.com | |
153,263 | Galera backup failing with error "mysqldump: Error 1213: Deadlock found when trying to get lock; try restarting transaction when dumping table" | We face the same issue like this posting on dba.stackexchange.com Deadlock from mysqldump --single-transaction, is it possible? . We offer DBaaS and can't control the DDL statements of our customers. [CODE] After that error the backup fails. This is the backup command [CODE] The accepted solution recommends Setup Maste... | Option 1 Use a replication slave off the galera cluster exclusively for creating backups. You can stop slave to ensure that all DDL operations have finished before doing a dump. Parallel dumping operations like mydumper are also possible. Don't forget to enable log-slave-updates on the galera member you use as a master... | 0 | 2 | 1,881 | 2016-10-25T12:21:37.187 | database_errors | dba.stackexchange.com | |
485,888 | LAN bandwidth in Linux is low | everyone, I connect two PCs both with 1000Mbps NIC. One(A) of them runs Fedora 8 while another(B) runs Windows7. I test bandwidth between them with Ixchariot, it shows about 10Mbps. If A and B both run Windows7, I run Ixchariot again and it shows about 1000Mbps. I transmit file from B to A(Fedora 8) and the speed is ab... | You do have a problem with either your NIC or driver. [CODE] reports that RX packets:290214 errors:0 dropped:889731948 overruns:0 frame:0 so almost 900,00,000 packets have been dropped and only 300,000 received! That is huged! Try investigating logs ( [CODE] and the output of [CODE] ). | 0 | 7 | 1,365 | 2013-03-08T06:41:46.673 | infrastructure | serverfault.com | |
122,355 | Ierrs on Network Interface - Pfsense/Freebsd | We're using PfSense as an internal router/firewall (no connection to WAN). Using the Web-GUI, under Status ---> Interfaces, there's one particular interface where I have some errors: [CODE] I then SSHed to the firewall to validate the info provided by the WebGUI and here's the output: [CODE] As you can see, both presen... | 1) There may be dosens of possible reasons. Most possible: you've got some buffer overruns. Analyze: [CODE] [CODE] [CODE] (USED/LIMIT) [CODE] (Errors/Buffers) You can also try some tuning described here: FreeBSD performance tuning: Sysctl parameter, loader.conf, kernel But these are intended for advanced sysadmins only... | 3 | 4 | 6,449 | 2010-03-14T16:00:02.657 | infrastructure | serverfault.com | |
560,575 | Supermicro IPMI unable to access through shared port | I have several supermicro servers (X8DTU-F, X7SPA-HF). I am using IPMI configuration with shared ethernet port (X7SPA-HF doesn't have dedicated port though). IPMI over ethernet is working perfectly. So servers network connectivity do. The problem is that servers can't access to it's ipmi ip through shared port localy (... | This is a known design "problem" with some shared IPMI access. This also affects Dell DRACs that use an Avocent BMC as well. It's just the way it is. For some reference: The reason one is unable to connect to the IPMI controller from the same machine through the network on this architecture is because this controller i... | 8 | 9 | 5,243 | 2013-12-11T03:14:28.557 | infrastructure | serverfault.com | |
742,537 | Are incorrectly configured DNS servers the root cause of slow logins to the windows domain? | We have six AD Windows servers (I believe they are all 2008 R2, running at a functional 2008 R2 domain) All six servers have the AD role and DNS role. We have about 1200 workstations in our environment and we have been experiencing extremely slow intermittent logins for a handful of workstations(mostly older machines).... | We usually set a DNS server to look at itself first for DNS. Do you also have Sites and Services setup correctly? Make sure you add any subnets and assign them to the correct Sites. If there are different sites, try to have a DC configured as a Global Catalog server in each site, and make sure they're setup as a bridge... | 1 | 1 | 2,384 | 2015-12-11T20:32:31.753 | infrastructure | serverfault.com | |
928,671 | how to stop postfix relay server to forward bounce/NDR emails to client | I have a setup with 1 pure mail server, lets call it mail , and 1 web server, lets call it web . When web sends out email to an external server it uses mail as relay. Both servers use postfix. mail has a MX record and is the the official mail server for the domain, web has no MX record and on this server postfix works ... | I found a solution: Because all of our emails contain an envelope from address of bounce@ourdomain.net I was able to add a transport rule on mail server that enforces local delivery. In main.cf I have this line: [CODE] In /etc/postfix/transport.regexp this line redirects all email send to bounce@ourdomain.net to the vi... | 0 | 0 | 707 | 2018-08-30T08:44:34.943 | infrastructure | serverfault.com | |
912,083 | Frequently pop up credentials for Outlook | When the first time user has keyed in the password, the Outlook is connected to Microsoft Exchange, then later it will pop up again and ask the password for several times. So this is very irritating for the user. This happens when the desktop/laptop is not joined to the domain. If the desktop/Laptop has joined the doma... | Common Issue and check out the following solution that can help to fix this: Method 1: Follow the below-mentioned steps to remove previously saved credentials. Click on Start and then click on Control Panel Click on Credential Manager Select the set of credentials that has outlook in the name and then click on the name... | 0 | 0 | 139 | 2018-05-14T08:37:45.497 | infrastructure | serverfault.com | |
859,172 | Not able to clone into repository on gitlab through port 80 | I'm encountering a very weird issue with gitlab-ce installed on a server with ubuntu server (I've tried this with ubuntu server 16.04 and 17.04) , which runs on my local network. I'm using gitlab with apache2, with the following set up: My /etc/gitlab/gitlab.rb file looks as follows: [CODE] My apache virtualhost config... | Although I didn't find out what causes this weird behaviour, I found the solution to the problem (Actually: I found out there was not problem there in the first place). I asked a friend to try to run the command [CODE] and it worked fine. So it seems the process of cloning into a repo on port 80 works fine from outside... | 0 | 0 | 1,094 | 2017-07-03T21:16:36.540 | infrastructure | serverfault.com | |
711,069 | How to resize a root persistent disk of a Drupal/Debian instance on Google Compute Engine | It's about a Drupal 7 site running on a debian 7 virtual machine instance on Google Compute Engine, deployed by this tutoriel Actually noting is running because boot/root disk full, MySQL crash ... [CODE] I follow this solution with snapshots for both disks, but I lose the drupal dependence in the new instance. [CODE] ... | I solved the problem by making two correct snapshots for both disks, and attach them to a new instance, one(root disk) as a boot disk, the other (Drupal files) as aditional disk, like this [CODE] According to this google cloud documentation , additional disks are not mounted or formatted when they are first created and... | 0 | 1 | 263 | 2015-08-05T15:52:00.057 | database_errors | serverfault.com | |
549,332 | How to set robots.txt globally in nginx for all virtual hosts | I am trying to set [CODE] for all virtual hosts under nginx http server. I was able to do it in Apache by putting the following in main [CODE] : [CODE] I tried doing something similar with nginx by adding the lines given below (a) within nginx.conf and (b) as include conf.d/robots.conf [CODE] I have tried with '=' and ... | location cannot be used inside [CODE] block. nginx does not have global aliases (i.e., aliases that can be defined for all vhosts). Save your global definations in a folder and include those. [CODE] | 30 | 7 | 78,334 | 2013-10-29T08:06:14.613 | infrastructure | serverfault.com | |
730,737 | Run ncat in background | from some time I'm trying to resolve very annoying issue: I need to have simple server which will listen on particular TCP port and throw all information which it recieve to trash. I'm doing it by running ncat: [CODE] As everyting is working fine I want to run ncat in background. After some testing I decided to keep it... | If running it in the background is your problem , you can use [CODE] instead of [CODE] nohup ncat -l 192.168.1.1 49111 -k -m 50 & You can then use [CODE] , [CODE] , [CODE] to interact with it if needed, as long as you don't exit the shell. If ncat is the problem , please provide more information about what you're tryin... | 1 | 0 | 3,063 | 2015-10-22T05:50:44.030 | infrastructure | serverfault.com | |
112,128 | How to know which user update/insert or delete in MYSQL database? | Using the triggers I could make the establishment of a historic recordings in MYSQL tables where i detect all changes in my database. My problem is that I want to know which user made the change in my database? | Depends on what version you are. You can install the audit_plugin: [CODE] You can choose two outputs, [CODE] or [CODE] . The output format will be: [CODE] WARNING NOTICE If you enable the audit_plugin (it's right with all logging processes like SLOW LOW, GENERAL LOG...) be careful to not saturate your disks in term of ... | 1 | 1 | 6,427 | 2015-08-25T14:06:16.037 | database_errors | dba.stackexchange.com | |
550,514 | Installing old version of mysql | I'm trying to troubleshoot a database import problem and want to duplicate the environment onto another server. This will require installing an older version of mysql, but the packages that are listed are only showing a recent version. I'm currently running debian wheezy 7.1 and what was installed was the packaged 5.5.... | Have you tried installing and configuring from scratch? MySQL is available all the way back to 5.0 on their webiste - http://downloads.mysql.com/archives.php There's a good guide here for a legacy version on Ubuntu; https://askubuntu.com/questions/56084/installing-old-mysql-server-4-1-on-ubuntu-11-04 Shouldn't need too... | 1 | 1 | 5,419 | 2013-11-04T09:30:52.710 | data_quality | serverfault.com | |
1,012,236 | CUPS client not working with docker container name | CUPS client cannot print when providing the CUPS server as container name, while it works fine with the container IP: Sample [CODE] : [CODE] The client container's [CODE] uses the name of the server container: [CODE] However, this configuration does not work properly (run inside client container): [CODE] I tried to add... | Turns out it was a CUPS server config issue. CUPS server logs in [CODE] : [CODE] Solution: Add [CODE] in [CODE] | 0 | 0 | 1,729 | 2020-04-14T12:11:54.350 | pipeline_ops | serverfault.com | |
1,033,871 | Kubernetes running Windows + Linux Containers | I built a trading research system which runs backtest jobs. The system is managed by several Linux-based containers which are responsible for managing jobs, analyzing results, and storing all jobs and results in a PostgresDB. The backtest itself runs on an application called TradeStation, which is only supported on Win... | This is a community wiki answer based on the comments and posted for better visibility. Feel free to expand it. Official documentation says that you can have a mix of Linux and Windows Nodes in Kubernetes cluster. However, there are a few peculiarities: A Linux-based Kubernetes kubeadm cluster in which you have access ... | 0 | 0 | 258 | 2020-09-14T17:20:57.617 | pipeline_ops | serverfault.com | |
287,420 | SQL Server 2019 using Linked server to Oracle 19c (19.9) using Oracle 19c client on Windows - DBCOLUMNFLAGS_ISNULLABLE error | Having issues selected data for some Oracle tables over the linked server from SQL Server: [CODE] Msg 7356, Level 16, State 1, Line 13 The OLE DB provider "OraOLEDB.Oracle" for linked server "RMTDB" supplied inconsistent metadata for a column. The column "CREATE_TIME" (compile-time ordinal 3) of object ""JOB1308"."HOST... | I found a support.oracle.com Doc ID 1519958.1 that describes the issue. For solution it says: Use the relatively simple work around of linking to a view that is based upon the table, instead of directly to the table. Apparently this issue has been around since 2012. | 1 | 0 | 1,985 | 2021-03-20T23:12:50.393 | database_errors | dba.stackexchange.com | |
98,722 | Strategy for regularly updating datasets from excel files | I have ~10 excel files which are produced by a third party and updated each night. I've have a script that downloads them to my local machine. They contain ~ 10 fields (all short text / dates) and between ~10,000 and ~1m rows in each. I'm planning to create a simple web application to enable people to search the data. ... | One method is to have two sets of tables (This1, This2, That1, That2, etc.), or a set of tables in separate databases/schemas. Either way, you now have SetA and SetB. Have a set of views that access one set of tables, say SetA. Perform the nightly imports to SetB. When the new data is ready to go, recreate the views, p... | 0 | 0 | 68 | 2015-04-24T00:59:26.797 | warehouse_errors | dba.stackexchange.com | |
297,364 | UDP Protocol - ICMP Error Generation | I know that UDP has no real error control facilties outside of silent discard of packets failing checksums. Am I correct in thinking that a UDP packet with a TTL=1 reaching a router will generate an ICMP Time Exceeded message, and a UDP packet arriving with an unused port # (54823 or something) at an end host will be r... | Yes, you're right. That is also how traceroute does it. | 0 | 1 | 556 | 2011-08-03T23:10:45.413 | infrastructure | serverfault.com | |
290,360 | Can't install PHP after apt-get dist-upgrade | I had a server with perfectly running for months classical LAMP installation on Ubuntu 8.04: [CODE] Don't know why I've started [CODE] , [CODE] but everything ended with [CODE] :) Everything gone alright... But now I can't start nor Apache, nor PHP, because PHP was simply deleted. When I'm trying to install it: [CODE] ... | Do this first: [CODE] Followed by: [CODE] | 1 | 2 | 2,050 | 2011-07-14T14:12:50.427 | infrastructure | serverfault.com | |
835,918 | Openconnect and Pulse Stopped Working | I connect to a pulse VPN via [CODE] and it has worked for months. This morning when I try to get in, after accepting the cert and doing username/password it just ends with [CODE] Is there a change I need? A workaround? | As Andrew pointed out, this is because the version of openconnect is out of date. Rather than have a self-built version of open connect, I actually added the package source for Zesty, updated just openconnect and turned off the package source. Given that I'll move to Zesty next month, this felt fairly low risk to me. | 9 | 4 | 5,626 | 2017-03-02T16:19:56.617 | infrastructure | serverfault.com | |
677,372 | Windows Server 2008 - Local Area Connection disappeared from ip interfaces | I have a Windows Server 2008 R2 machine. Local Area Connection isn't working anymore, the interface exists but it doesn't as an ip interface. [CODE] If I try to assign an IP Address I get this: [CODE] What happens? Windows has lost network configuration? I've also tried to reset ipv4 and ipv6 networking using netsh but... | Ok, I've finally managed to solve the issue. The problem was the network adapter driver. I needed to download DevCon.exe and: List all network adapter installed Find the physical one Delete the driver Rescan system for new devices. Finally "Local Area Connection" reappeared within the list of ip interfaces. | 0 | 0 | 1,770 | 2015-03-22T13:59:13.683 | infrastructure | serverfault.com | |
310,821 | Backup solution for hosted server. | We have a need to backup around 6GB's worth of .bak files on a weekly basis. These files are stored on a hosted dedicated server running Windows Server 2008 r2. Unfortunately the constraints on this solution mean it has to come at zero cost. I have looked at SkyDrive and with their 25GB limit it seemed like the perfect... | 4 sites that give you 10gb of storage: http://www.makeuseof.com/tag/4-best-sites-10gb-free-online-storage/ I suggest that if backups are that important to you- you pay for a solution -- Does your hosting provider offer something? | 0 | 1 | 95 | 2011-09-13T10:56:11.297 | data_quality | serverfault.com | |
452,557 | Coldfusion autorestart | Coldfusion is automatically restarting, a lot. It comes in waves, everything seems fine for a while then the server struggles for a few minutes, restarts a lot then settles down again. I have Fusion Reactor installed, but when CF goes down FR stops logging so it's not really helping. Looking through the archived logs j... | The ColdFusion Administrator has a section for log files. I would look at all of them. Application.log might be particularly useful. Also consider logging all of the incoming requests to a DB. The logging should also include the query strings. | 1 | 1 | 261 | 2012-11-27T12:29:54.107 | hadoop_errors | serverfault.com | |
739,919 | Varnish 4.1 Stopped After Restart and Won't Stay Started | I upgraded from Varnish 4.0 to 4.1, had one minor issue at the beginning and fixed that and was up and running. I needed to clear the cache and when I restarted Varnish it said "Starting", but when checking the status it shows stopped. Nothing has changed on the system or the configs. Varnish.log is empty and messages ... | I'm running your vcl file with varnish4.1 on centos6.5 (of course after corrected it) and can see: [CODE] The reason you don't have this file is simple, your vcl file is not compiled properly. Correct your default.vcl ( you should remove unused [CODE] ): [CODE] | 0 | 1 | 1,983 | 2015-12-01T06:51:25.063 | infrastructure | serverfault.com | |
144,204 | MySQL replication on slave server Broken/Stopped without error | (Hi; sorry for my English) My question is: how can I restart MySQL replication on a slave server. At first sight everything seems to be normal but when I check with [CODE] besides Relay_Log_Space, Read_Master_Log_Pos and Seconds_Behind_Master which continue to increase. Other data remain fixed for several days. I tried... | Slave_SQL_Running_State: Reading event... Suggests that it's working on a large event. If you have MIXED or Row based binary logging and have changed a large amount of data on the master you might end up with a large event or series of large events. Use the mysqlbinlog tool to see what's going on with your relaylog. Th... | 0 | 1 | 685 | 2016-07-18T14:38:45.567 | database_errors | dba.stackexchange.com | |
58,923 | Oracle silent install on Redhat Linux (The Global database name was left blank.) | I am installing Oracle 11g in silent mode using the response file that is in the database/response directory. It is three response files in that directory(i.e. dbca.rsp, db_install.rsp and netca.rsp). I am using db_install.rsp and customize its properties to use it in runInstaller command in database directory. At firs... | ./runInstaller -silent responseFile=/home/oracle/db_install.rsp -showProgress DECLINE_SECURITY_UPDATES=TRUE The above line is wronge. I changed it like the following and it works fine. ./runInstaller -silent -responseFile /home/oracle/db_install.rsp -showProgress | 1 | 2 | 4,645 | 2014-02-14T08:11:02.913 | database_errors | dba.stackexchange.com | |
566,791 | Can I apply a Group Policy only to systems that have specific software installed? | If I wanted to setup a group policy that installed Java, this would be no problem. But is it possible for the group policy to only apply to systems that have Mozilla Firefox installed? I don't know much about WMI, but I imagine if it can be done, it would be with a WMI filter? Is this possible? | Answering your question: yes it is possible with WMI filter. from a nice blog on technet with examples: example WMI: Select * from Win32Reg_AddRemovePrograms where displayname = "nvidia drivers" AND version = "1.10" source: http://blogs.technet.com/b/askperf/archive/2010/06/18/group-policy-filtering-of-installed-applic... | 4 | 6 | 6,081 | 2014-01-12T22:56:23.987 | infrastructure | serverfault.com | |
186,240 | How to fetch last row order by date and group by id | I am trying to skip duplicate [CODE] and take only last update row [CODE] | If I'm following you correctly, for each row in [CODE] , you want the most recent matching row in [CODE] . This query should do that: [CODE] Here's how it works: In the subquery referred to as [CODE] , we select the necessary columns from the [CODE] table, plus the maximum update date for that product. Then, we connect... | 1 | 2 | 9,310 | 2017-09-18T17:02:54.217 | data_quality | dba.stackexchange.com | |
157,976 | Is it bad to have a cyclical relationship? | I have 5 tables that have ended up with a cyclical relationship and I don't think that is ok. I School is in one County. A Distict has many Counties. A Teacher can teach in many Districts. STUDENTRECORD - RecordId, TeacherId, CountyCode COUNTY - CountyCode, CountyName, DistrictId DISTRICT - DistrictId, DistrictName TEA... | Here is the original model -- at least as worded in the question. Though there is nothing cyclical here it does have few problems. For example, the model has no relationship between [CODE] and [CODE] , although you do state that "District has many Counties". It is also possible to have [CODE] such that that teacher doe... | 1 | 3 | 2,795 | 2016-12-13T00:13:23.767 | warehouse_errors | dba.stackexchange.com | |
499,394 | How do I increase UDP Recv-Q | I have a gigabit connection that is not fully utilized but I am getting packet receiving loss. When I do netstat, it shows the Recv-Q sometimes maxes out at 262656 during heavy traffic. [CODE] I've tried increasing these settings and rebooting my application but it doesn't seem to do anything. [CODE] How do I increase ... | Since Kernel 2.6.25 you have: [CODE] [CODE] has details | 1 | 2 | 8,786 | 2013-04-15T07:07:42.140 | infrastructure | serverfault.com | |
774,781 | iptables, ufw, and psad - scanned UDP port alerts from router and devices on home network | I have a fresh install of Ubuntu 16.04. I configured iptables, ufw (with gufw), and psad using instructions from https://www.thefanclub.co.za/how-to/how-secure-ubuntu-1604-lts-server-part-1-basics and https://www.thefanclub.co.za/how-to/how-install-psad-intrusion-detection-ubuntu-1204-lts-server . Everything seems to w... | You have to tune your firewall if you'd like to reduce this kind of noise. In your case, one possible way might be to add a rule to your firewall that allows all incoming connections on UDP ports that originate from your local network. | 2 | 1 | 659 | 2016-05-04T12:08:22.623 | infrastructure | serverfault.com | |
195,345 | Generate a new Volume ID in Linux | Sparing most details/reasons, I have a situation in which I'm cloning drives for mass production. Some of them are being installed in servers that only need one disk (in that case this is a non-issue), but some are being installed in servers that will use 2 of them in RAID1. In another case we're building a tool to ass... | Read the mbr from the disk, change the disk signature which is the 4 bytes @ offset 440 in the mbr then write it back to the disk. [CODE] Note: I tested this by saving the output of od -x for mbr.dat and newmbr.dat and then running a diff on the 2 text files which shows that only the relevant 4 bytes are changed. [CODE... | 1 | 1 | 1,488 | 2010-10-27T14:32:28.670 | data_quality | serverfault.com | |
568,189 | How to perform Hardware disaster recovery with backup server | I have a two windows server 2003 R2 servers with same configuration(same processor,same motherboard etc). One is original server and another one is backup server(Not to store backup files,it is a server used in case original server gets crashed). So in case any hardware problem in original server like motherboard probl... | Your question could be more concise however I'll do my best to answer. I would not count on being able to simply remove the disks from one machine and plant them into another, especially if the RAID controller is different. There are any number of factors (RAID controller, RAID level, etc) that would make this a risky ... | 0 | 2 | 548 | 2014-01-18T12:04:20.563 | database_errors | serverfault.com | |
865,637 | Sync WindowsImageBackup folder | I have a server running Windows Server 2016 Essentials. (Usually try and avoid the SBS type versions although I was hoping they hadn't hobbled things in 2016, ... but yes, they have) This customers previous server backed up to a NAS using Symantec System Recovery, which we've always had good success with On this system... | Looks like I was being a bit stupid. The backup was configured to store in the root of the USB drive ( [CODE] ), which creates a [CODE] folder. When syncing the backup, I was just using [CODE] as the source. Because of this it was trying to copy system directories on the root of the drive which don't really have anythi... | 0 | 0 | 591 | 2017-07-28T08:53:35.127 | data_quality | serverfault.com | |
101,963 | Oracle Alter table add partition by reference gives "invalid datatype" error but create table with partition works | I have a parent and child tables. Parent table has a partition and a sub partition. Child table needs to have reference partition based on parent partition. Problem: If I create a new child table and creates a reference partition based on foreign key from the parent, child table gets created without any problem. But if... | It looks like a non-partitioned table can not be partitioned using Alter table add partition command. For the "alter table add partition" command to work, table should already have at least 1 partition. In other words, the table should be a partitioned table already. That is the reason, create Table SQL given above wit... | -1 | 1 | 7,990 | 2015-05-19T21:45:50.440 | database_errors | dba.stackexchange.com | |
511,137 | Apache url rewrite not working | Currently I can access my url in this way. [CODE] But I want to make it to [CODE] So I used the following rewrite sequence [CODE] But xxxxxx.com/login is giving me 404 Not found. rewrite.load is present in mods-enabled/ | Do you use .htaccess file? please check AllowOverride directive in a Vhost configuration, should be: AllowOverride All. | 0 | 0 | 96 | 2013-05-27T12:08:09.043 | infrastructure | serverfault.com | |
1,099,969 | Getting "Fargate requires task definition to have execution role ARN to support ECR images." when creating Fargate task but the role is defined | I am trying to deploy a very simple web application to AWS Fargate. I have pushed a docker image of the backend of the application to ECR and I am trying to setup a Fargate task definition for the container. I have all of the properties of the task defined, the setup is fairly simple, but the task wont create and I am ... | I just encountered this issue and was able to resolve it with AWS. Apparently there is a bug when adding the permissions associated with the IAM Role when using the GUI for task definitions. To resolve this you can go to Cloud formation to specify the configuration file there. You should see your failed task definition... | 6 | 5 | 7,828 | 2022-05-02T17:40:09.090 | pipeline_ops | serverfault.com | |
158,374 | replace text in file without overwriting file | I want to use the command line to edit a text file but not overwrite it. I want to preserve the owner, group, and permissions of the file. I have a file that holds a count of the number of times a piece of equipment is used. This file lets me know when the equipment needs to be serviced. There is zero concern about sec... | Isn't that what the -i option is for? [CODE] If you supply an argument to -i, it makes a backup for you. | 3 | 1 | 3,742 | 2010-07-07T21:42:13.190 | infrastructure | serverfault.com | |
452,161 | NAT: If two hosts initiate a connection to the same IP:PORT, with the same source PORT, how does the router handle it? | I was just thinking and that idea came to my mind. Let say I have hosts A and B inside my local area network. I have a Router, and a host C in the internet. I know that when initiating the connection, the source port is chosen randomly, but what happens if two hosts chose the same when initiating to the same host:port?... | Just because hosts A and B chose port 10123 doesn't mean that is the port that the router uses. The router connects to host C from a source port of it's own choosing. So the connection looks more like this: [CODE] | 10 | 11 | 5,754 | 2012-11-26T11:48:55.920 | infrastructure | serverfault.com | |
206,779 | Postgres 10.3 could not bind IPv6 address, database system was not properly shut down | I am running Postgres v10.3 through Docker (docker-compose, specifically). It is not turning back on. I get the following error message when I try to turn it on: [CODE] I may have shut down the database as I was writing to it, which is the only thing I can think of that would have caused this. I do not have a backup wh... | Those messages are unrelated. The first one will show up every time you start postgresql if your machine is not configured to use IPv6. You can just ignore it if you don't care about IPv6. The other one is a bit more complex. 'system was not properly shut down' means it was interrupted without being given a chance to d... | 1 | 2 | 2,810 | 2018-05-15T14:41:26.680 | database_errors | dba.stackexchange.com | |
922,663 | Postfix appends hostname instead of domainname to outgoing mail | I did a basic postfix config on my Ubuntu VPS. When I try to send mail using the command: [CODE] The mail fails. Upon inspection, I notice that postfix was trying to send the mail as user@hostname.domain.tld instead of user@hostname.tld The mail is then rejected on the premise: "host-not-in-DNS return address not allow... | With locally submitted mail Postfix will by default append the string [CODE] to mail addresses without domain information. Typically the default config sets the value of [CODE] to [CODE] but you can change that to your domain instead. | 0 | 0 | 1,044 | 2018-07-19T12:12:20.967 | infrastructure | serverfault.com | |
913,545 | Enabling Hyperthreading on a Centos 7.3 server using Intel Xeon E5620 | I have a Centos 7.3 server running a dual socket quad core Intel Xeon CPU E5620 @ 2.40GHz. I would like to use hyperthreading on this server but it seems it has been disabled. The spec sheet for this chip indicates it should support hyperthreading: Intel® Hyper-Threading Technology ‡ Yes https://ark.intel.com/products/... | Please enable Hyperthreading in the system ROM or BIOS utility. Depending on the server solution, this needs to be done before the system boots. | 0 | 1 | 4,357 | 2018-05-24T02:51:11.537 | infrastructure | serverfault.com | |
119,447 | How to insert/update millions of rows inside a sql server table(s) in an effective way? | Often in my job I have to create a procedure inside SQL Server that will process millions of data rows, save them into a temp table (staging table) and finally save them into a table (s) in a database(s). I am not looking into alternative solutions, like SSIS. I cannot disable the indexes,constraints, take DB offline, ... | opinion based answers are not the most popular here, try to give evidence when possible. Well, that is not entirely fair given that ultimately, the "evidence" for what works the best will come from your system ;-). Your hardware, your data, your system load, etc will determine what works the best. There are a lot of va... | 5 | 4 | 11,951 | 2015-10-28T15:28:33.423 | database_errors | dba.stackexchange.com | |
614,785 | Unexpected failure, please try later (in reply to end of DATA command) | while trying to send emails to the following address [CODE] i always get the following error message. Could any one tell where can i look in order to find what's going wrong? This is the log lines generated by postfix: Jul 23 11:42:20 we postfix/smtpd[4998]: connect from we.webeloping.es[127.0.0.1] Jul 23 11:42:20 we p... | That's not exactly a bounce message, it's a temporary delivery failure message. The recepient's mail server is telling you that the problem is [CODE] . Your mail server says that it will keep trying to send the message until Sunday Jule 27. The reason for this temporary failure isn't possible for anyone other than the ... | -1 | 2 | 2,536 | 2014-07-23T09:58:41.687 | infrastructure | serverfault.com | |
29,336 | MySQL unique constraint across two columns | I have a table defining relationships [CODE] I need to add a constraint that says if a given values is present in one of the columns, then. 1) Cannot be duplicated in the same column. 2) Cannot be duplicated in the other column either. This is invalid [CODE] Since the value 1 is present in the first row, it cannot be p... | I have modified ypercube's solution a little bit, so that both source and destination are not null, as is guaranteed by the original design. My [CODE] constraints are commented out, as they apparently will not work in MySQL. I kept them as comments because they document my intent, and they will work on other RDBMS. [CO... | 6 | 5 | 10,810 | 2012-11-27T06:52:13.370 | database_errors | dba.stackexchange.com | |
376,210 | Team is estimating story points, business wants actual time | I'm sure this is not an uncommon theme. We have two scrum teams that are doing an okay job of estimating user stories using story points (the current team constellations are only about 8 months old, although the team members have several years of scrum experience). But it's hard for the business part of the company to ... | You are correct, there is not a formula to convert story points to hours. You can get a pretty lossless conversion of meters to feet, and vice versa, but you can't say a 3 point story will take X hours, so a 5 point story will take Y hours (solve for Y). HorusKol touched on this next part. Your sprint velocity as a tea... | 16 | 16 | 3,643 | 2018-07-31T21:37:47.080 | api_errors | softwareengineering.stackexchange.com | |
425,744 | Configuring SSL hosts to be able to access HTTP / HTTPS on multiple domains? | I'm having trouble configurig multiple ssl hosts on my apache server (CentOS). Originally I thought the problem was only having one IP, so once this was discovered I asked our server provider to add another IP which they did. However, I'm still having problems. We want to be able to have http & https access for both of... | Just comparing the definitions of the two https virtual hosts, I see discrepancies. On your .27 Virtualhost, you have ServerName domain1.com:443 SSLProtocol all -SSLv2 SSLCipherSuite ALL:!ADH:!EXPORT:!SSLv2:RC4+RSA:+HIGH:+MEDIUM:+LOW and on your .41 Virtualhost, you have ServerName domain2.com I'll readily admit I don'... | 2 | 0 | 362 | 2012-09-05T11:26:16.360 | infrastructure | serverfault.com | |
103,671 | UPDATE with Nested Query | This is what i've tried [CODE] this give the error #1248 - Every derived table must have its own alias [CODE] both run but have no affected rows. I am trying to populate the albumID in the music table with the albumIDs that are in the albumList table. | If it is MySQL, you can do this with a simple join: [CODE] You could use a correlated subquery for this (similar to your 2nd attempt) but I wouldn't suggest it for MySQL. Less efficient and more complicated as it needs an additional condition in the [CODE] clause to protect from updating [CODE] with null, for rows that... | 1 | 3 | 8,239 | 2015-06-10T01:35:10.580 | warehouse_errors | dba.stackexchange.com | |
92,396 | VPS Server Thousands of Security Audit Failure Events | I am new to managing a hosted Windows vps and in the past 4 days my security event log shows about 35,000 Events as: Audit Failure "An account failed to log on." These appear to be recurring attempts to gain access using a variety of user names. This is a Win 2008 R2 vps. A few questions: 1 - Is this normal to receive ... | If your computer has a publicity accessible IP, then it's in the wild and yes, it's normal. This is a sad & unfortunate reality. What services do you have exposed to the internet? smb/cifs/rdp/rras ? You'll need to limit your attack surface by shutting down services that aren't needed, or beefing up your firewall rules... | 0 | 1 | 502 | 2009-12-08T22:42:41.677 | infrastructure | serverfault.com | |
189,516 | minicom US Robotics 33.6 Sportster Debian Linux | I am trying to get a US Robotics Sportster 33.6 modem external working in minicom. When I fire up minicom it will initialize the modem and the lights will fire up, but it will not let me send any commands to the modem within minicom. Any ideas as to why this is happening? Also, no errors are showing up. I am trying to ... | Type [CODE] (even if the display shows nothing) and then press Enter. Try to lower the speed and alwayst test with ATZ and Enter. | 0 | 0 | 295 | 2010-10-10T17:39:36.340 | infrastructure | serverfault.com | |
111,286 | How can I Rewrite Update Query to Update Using First Record From Inner Join? | I wrote up a question about trying to do an update with an [CODE] last week that got a lot of answers that I am currently trying out. Here is the link to the answer I used to get to the point I'm at now, which seems to only be half the problem. I believe I tracked down the other half of the problem which is that my [CO... | The composite index on (state, city) will not be used if you use the function [CODE] in your query. You may want to update both field in both tables first: [CODE] Then run the query without [CODE] On a side note, your index is better to be switched to have city before state, because cities have higher cardinality [more... | 1 | 2 | 126 | 2015-08-17T15:03:58.893 | warehouse_errors | dba.stackexchange.com | |
56,751 | Drop all nan value in Series | I have try to drop a nan value like so [CODE] what am i missing, because i still get nan value in my panda series. | [CODE] is a series in your data, if you have even only one [CODE] value in your series , [CODE] , then you will loose all of your series. Another problem might be in the [CODE] column values might not be suitable for converting to [CODE] such as [CODE] (not [CODE] ), [CODE] , [CODE] etc. Then you will loose your series... | 0 | 3 | 173 | 2019-08-01T11:10:50.487 | data_quality | datascience.stackexchange.com | |
287,695 | Does a VPS mitigate risks of a DDOS attack versus shared hosting? | A client of mine has a website on a shared hosting account, and one of the other accounts on that server was targeted by a DDOS attack, which of course brought all of the websites on that server down. We're talking about moving to a dedicated server or VPS to help mitigate this in the future. I am fully aware that this... | The risks will be slightly reduced, but not eliminated obviously. In general, there will be fewer customers on a VPS host than reside on a shared webserver, making fewer potential targets. Of course this is all completely theoretical, and there's literally nothing that can stop a determined DDoS attack short of having ... | 2 | 6 | 2,129 | 2011-07-06T21:56:25.157 | infrastructure | serverfault.com | |
104,784 | Call function from one class in the same class | I have 2 classes [CODE] and [CODE] . I am defining a function [CODE] inside [CODE] . Now I want to call [CODE] inside [CODE] . How can I call it? I tried the following: [CODE] The above code gives me error [CODE] EDIT 1: I applied the changes as suggested in the comments: [CODE] The last line where I create an instance... | Using [CODE] is indeed the correct way of calling the function inside the class. However the issue here is that your call is not part of a function, putting the for loop with the call inside a function (e.g. [CODE] ) should solve the error as [CODE] is defined within the function (passed as the first argument). | 0 | 1 | 17,138 | 2021-12-05T07:36:07.540 | data_quality | datascience.stackexchange.com | |
568,456 | How to upgrade apache2 for PCI | My website was scanned for PCI-compliance. Vulnerabilities found: [CODE] The site is running on apache2 (2.2.22-1ubuntu1.4) on Ubuntu 12.04 LTS. 'apt-get upgrade' says that it's already the latest version. I found http://ubuntuforums.org/showthread.php?t=2011603 and upgraded apache2 to 2.4. But after upgrade, apache2 d... | First, you show the vendor these, which show that you're running software that's either already fixed for, or is not affected by, the listed vulnerabilities: http://people.canonical.com/~ubuntu-security/cve/2012/CVE-2012-3499.html http://people.canonical.com/~ubuntu-security/cve/2012/CVE-2012-4558.html http://people.ca... | 1 | 5 | 949 | 2014-01-20T05:01:36.893 | infrastructure | serverfault.com | |
259,564 | A and CNAME records vanish overnight on AD Integrated DNS zone | I have a Windows Server 2008 AD Integrated DNS zone across two domain controllers, I have added various CNAMEs pointing to our Build and Dev Web servers to support or continuous integration process. These CNAME, and the A record for a server vanish over night, not all of them just a small selection usually between 5 an... | I'd still suspect scavenging, personally; those settings have a habit of not working right. The per-zone settings and per-server settings combine to make for some strange behavior. But, we don't have to guess at what's going on. Turn on the [CODE] security audit category on your domain controllers; more info on how to ... | 1 | 1 | 1,774 | 2011-04-14T09:45:16.290 | infrastructure | serverfault.com | |
76,642 | Registry read permissions (scripting) on Windows Server 2003 | Executing the following VBScript on our Windows Server 2003 [CODE] yields the following error [CODE] although the user (Administrator) definitely has the necessary permissions. Reading the key directly from the command line works: [CODE] and the permissions (as shown by regedit) are default: Full Control (LOCAL SERVICE... | I get that error unless I put a specific registry key in the read command [CODE] | 2 | 1 | 3,504 | 2009-10-21T08:11:16.680 | infrastructure | serverfault.com | |
405,576 | How do I troubleshoot a segfault in Ubuntu that occurs when typing a bogus command? | Possible Duplicate: My server's been hacked EMERGENCY We've got a production server running Ubuntu 11.10. We're encountering segfaults that appear under various conditions. The simplest reproducible case is when we login to an ssh session as our administrative user and enter a bogus command. You'd expect the standard "... | Ubuntu implements a command-not-found function in /etc/bash.bashrc that calls a python script to provide more helpful suggestions than the default "command not found" error message. Perhaps the package or some dependencies need to be re-installed. A simple test to see if this package is at fault would be to remove the ... | 1 | 3 | 3,861 | 2012-07-06T23:23:29.693 | data_quality | serverfault.com | |
1,034,517 | How can I enable PowerTools repository in RHEL 8? | This is a similar question to: How to enable PowerTools repository in CentOS 8? I am trying to to setup a headless web server on my EC2 AWS running on RHEL 8.2. As it is a headless server with no GUI, I just need to the firefox browser to do some web configurations. With that said, on on the client side, I am using Put... | CentOS and RHEL are actually different, despite one being "clone" of the other. The canonical name for the repository in question is actually CodeReady Linux Builder . However, it is trademarked, and as such, in CentOS it has a different name - PowerTools. Since you are using RHEL, you should enable CodeReady Linux Bui... | 3 | 5 | 16,281 | 2020-09-19T08:53:15.083 | infrastructure | serverfault.com | |
810,950 | Active process swapping despite free memory | For some reason our system starts swapping (actively used memory) at around 60GB used memory. (see edit below, it seems I/O and disk cache usage, even of previously run processes has an effect) Turning it off ( [CODE] ) for test lead to bad_alloc's once (i guess because there were more processes also using memory at th... | 64 GB seems to be the limit for 32 bit Ubuntu with PAE support: https://help.ubuntu.com/community/32bit_and_64bit A 32-bit computer has a word size of 32 bits, this limits the memory theoretically to 4GB. This barrier has been extended through the use of 'Physical Address Extension' (or PAE) which increases the limit t... | 2 | 0 | 661 | 2016-10-24T14:58:42.347 | infrastructure | serverfault.com | |
9,616 | Problem with Connecting Jenkins to SonarQube | I have a Jenkins pipeline that periodically pull from gitlab and build different repos, build a multi-component platform, run and test it. Now I installed a sonarqube server on the same machine (Ubuntu 18.04) and I want to connect my Jenkins to sonarqube. In Jenkins: I set up the sonarqube scanner at [CODE] as below: I... | Create and add token to be able to connect to SonarQube. You have create project in SonarQube and use it as a parameter: [CODE] Copied from [StackOverflow] Problem with Connecting Jenkins to SonarQube . | 2 | 1 | 4,365 | 2019-10-30T13:26:20.230 | pipeline_ops | devops.stackexchange.com | |
93,609 | Mysql master master with high latency | We have a single master setup with many slaves in germany and some slaves in australia. To have faster writes in australia we want a master-master setup between germany and australia. Read slaves will remain under the local master in both regions. We tested Percona XtraDB Cluster, but the commits are synchronous, and w... | PXC (and other Galera solutions) require one network hop at COMMIT time. If your application can combine writes into a single transaction, that will help at some level. However, still each COMMIT will take 300ms (or whatever it is). Regular MySQL can do Master-Master and have both writable. That replication is asynchro... | 0 | 1 | 896 | 2015-02-23T22:48:15.017 | database_errors | dba.stackexchange.com | |
928,641 | Nginx 403 Forbiden during Prestashop installation | I am trying to install Prestashop on my Centos 7 server with Nginx as a webserver. Here are the steps I took: [CODE] But when I try to access https://example.com I get a 403 Forbidden response. Here is my /etc/nginx/sites-available/example.com.conf file content: [CODE] Thanks for your help guys. Cheers p.s: I ran all t... | I finally found a solution to this issue. Even when running nginx -t , if everything is ok, does not mean that it actually is regarding to your nginx.conf content (or yoursite.com.conf content). So, my problem was the most comon one's met with Nginx and 403 Forbiden message, i.e, as you can notice on my .conf file, the... | 0 | 0 | 1,299 | 2018-08-30T04:39:49.843 | api_errors | serverfault.com | |
546,127 | Adding alias to an Office 365 mailbox with dirsync | We've recently migrated to Office 365 with a new Active Directory structure and as part of this the naming convention for all the e-mail addresses has changed. This isn't a problem for most users, but some users have stationery with their old style e-mail address so we need to add these address as aliases for these use... | Inside ADSIedit under the ProxyAddresses field is correct. You want the primary one to be preceded by [CODE] in all caps. In this case set it as [CODE] The secondary/tertiary ones should be preceded by [CODE] all lowercase. In this case set it as [CODE] Make sure the [CODE] attribute in their user account in AD (the on... | 1 | 7 | 62,378 | 2013-10-15T13:44:52.937 | infrastructure | serverfault.com | |
58,663 | What is the best way to upgrade a MySQL version in a Linux Server | What is the best way to upgrade a MySQL version in a Linux Server I have database around 14 GB running with 8 -15 GB ram(diffrent deployments) .At present MySQL version is 5.5 and I’m planning to move to 5.6 . I did similar activity in past for 5.1 to 5.5 upgrade . Steps I followed is 1. Resolve any syntactical issue t... | In most cases, in-place binary upgrade of MySQL 5.5 to MySQL 5.6 is possible without many problems. This is too small to detail all potential issues while performing the upgrade, but I will leave you the general steps: Clone the MySQL server to a testing environment. I do not believe that you do not have 15GB on your l... | 3 | 5 | 1,531 | 2014-02-11T15:59:52.800 | database_errors | dba.stackexchange.com | |
134,214 | SQL Server MIRRORING - FAIL ON SECONDARY | I have a problem in the SQL Server Mirroring. Current system: Server: S1 (Principal) & S2 (Secondary) Databases: D1 (2.5TB) & D2 (20GB) Situation 1: without witness 1. D1 & D2 were setup mirroring ok, after a week, the transactions are coming from users, I try to restart SQL Server on S1 . 2. After S1 restart, mirrorin... | Situation 1 So when you restart SQL server while users are connectd & D1 database is 2.5TB so it take's more time to failover then D2 database.Also I assume there will be more activity on D1 then D2 database. As you did unplanned restart of SQL server on bussy database (D1) so mirroring get distructed may be packet los... | -1 | 0 | 273 | 2016-04-03T12:10:53.700 | database_errors | dba.stackexchange.com | |
782,192 | PHP-FPM using too much memory | I have a VPS box that runs a few websites for me as well as some scripts and it seems like its running out of memory. It has 1GB total memory. It looks like php-fpm exhausts the memory. Before it was simply killing other processes (like mysql) to free memory. The error was: [CODE] I solved that using this solution: php... | (this should be a comment but its a bit long). "I solved that using this solution" - unfortunately most of the opinions there are wrong. [CODE] This means that: your system is configured to overcommit memory. Memory overcommit is useful when you have to manage badly written, long-running processes written in object ori... | 0 | 3 | 7,814 | 2016-06-06T11:23:33.077 | database_errors | serverfault.com | |
46,995 | PostgreSQL: How to list all stored functions that access specific table | Introduction: PostgreSQL database with several hundred of stored functions, including obsolete, not used etc. Problem I need to find out all the stored functions that have any relationship to the table X - as I want to change the table structure. Some of them might be not used, so I can't do that just by looking throug... | The body of a function is just stored as string . There is no list of referenced objects. (That's different from views, for instance, where actual links to referenced tables are saved.) This query for Postgres 10 or older uses the system catalog information function [CODE] to reconstruct the [CODE] script for relevant ... | 17 | 24 | 37,405 | 2013-07-25T05:03:13.510 | database_errors | dba.stackexchange.com |
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