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nl2bash

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nl
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387
bash
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1
532
Prints a random number between 2000 and 65000
seq 2000 65000 | sort -R | head -n 1
Print a random number from 2000 to 65000
seq 2000 65000 | sort -R | head -n 1
Print a randomly sorted list of numbers from 1 to 10 to file "/tmp/lst" and the screen followed by " -------"
seq 1 10 | sort -R | tee /tmp/lst |cat <(cat /tmp/lst) <(echo '-------')
Print A record for domain 'domain.' from 'ns1.newnameserver' nameserver
dig @ns1.newnameserver domain. a
Print A record for domain 'domain.' from 'ns2.newnameserver' nameserver
dig @ns2.newnameserver domain. a
Print A record for domain 'domain.' from 8.8.8.8 nameserver
dig @8.8.8.8 domain. a
Print a sorted list of *.so files in the bla directory tree
find bla -name *.so -print0 | sort -rz
Print a sorted list of directories from the ~/Music tree containing files whose names begin with "cover."
find ~/Music/ -iname 'cover.*' -printf '%h\n' | sort -u
Print a sorted list of the extensions of the regular files from the current directory tree
find . -type f | grep -o -E '\.[^\.]+$' | sort -u
Print a sorted list of regular files from directory tree /folder/of/stuff
find /folder/of/stuff -type f | sort
Print a sorted list of the subdirectories of ~/Music
find ~/Music/ -maxdepth 2 -mindepth 2 -type d | sort
Print a sorted list of unique directory paths in entire file system that match the pattern '<name_pattern>' in their names
find / -name '<name_pattern>' -type d | sort | uniq
Print a space separated list of numbers from 1 to 10 with no trailing new line
seq 10 | xargs echo -n
Print a summary of the command-line usage of find
find --help
Print a top 20 histogram of characters used from standard input showing backslash escapes for non-displayables
od -cvAnone -w1 | sort -b | uniq -c | sort -rn | head -n 20
Print a unique list of characters from standard input showing backslash escapes for non-displayables
od -cvAnone -w1 | sort -bu
Print a welcome message with the current user's user name
echo "Welcome $(whoami)!"
Print a welcome message with the current user's user name
echo "Welcome `whoami`!"
Print a welcome message with the current user's user name
echo -ne "Welcome $(whoami)!\n"
Print a welcome message with the current user's user name
echo -ne "Welcome `whoami`!\n"
prints absolute file paths for files in current directory
find `pwd` -maxdepth 1
Print the absolute path of "$path"
readlink -f "$path"
Print absolute path of "YOUR_PATH"
readlink -f YOUR_PATH
Print absolute path of java executable
readlink -f $(which java)
Print the absolute path of third-level files under the current directory tree and number the output
ls -d -1 $PWD/**/*/* | nl
Print all '-' separated digits in file 'infile' as dot ('.') separated digits
grep -Eo '([0-9]+-){3}[0-9]+' infile | tr - .
Print all business days in the current month without column titles
cal -h | cut -c 4-17 | tail -n +3
Print all directories under $root appending a : (colon) at the end of each path without descending into directories matching the pattern .[a-z]*
find "$root" -name ".[a-z]*" -prune -o -type d -printf '%p:'
Print all distinct characters in input "He likes cats, really?"
echo "He likes cats, really?" | fold -w1 | sort -u
Print all files and directories in the `.' directory tree skipping SCCS directories
find . -name SCCS -prune -o -print
Print all files/directories under ... directory by terminating their paths with a null character
find ... -print0
Print all files/directories with their sizes under $WHATEVER directory tree
find $WHATEVER -printf "%s %p\n"
Print all files containing "word1" and "word2" in the current directory tree
comm -12 <(grep -rl word1 . | sort) <(grep -rl word2 . | sort)
print all files in the current directory and all subdirectories
find .
print all files in the current directory and all subdirectories
find . -print
Print all files in the current directory as a comma separated list
ls -1 | paste -sd "," -
Print all files in the current directory tree as a comma separated list
find . -type f -print0 | tr '\0' ','
Print all files in the current directory tree as a comma separated list
find . -type f | paste -d, -s
print all files in the directories except the ./src/emacs directory
find . -wholename './src/emacs' -prune -o -print
print all files in the file system excluding those ending with ".c"
find / \! -name "*.c" -print
Print all files on the system owned by group `name_of_group'
find / -group name_of_group
Print all file/directory names with white space safety under the /proc directory
find /proc -print0 | xargs -0
Print all file/directory names without white space safety under the /proc directory
find /proc | xargs
Print all files that exceed 1000 blocks and were modified at least a month ago
find / -size +1000 -mtime +30 -exec ls -l {} \;
Print all files with a '-' after their name if they are regular files, and a '+' otherwise
find / -type f -exec echo {} - ';' -o -exec echo {} + ';'
Print all filenames in /usr/src except for those that are of the form '*,v' or '.*,v'
find /usr/src -not \( -name "*,v" -o -name ".*,v" \) '{}' \; -print
print all filenames of files under current dir containing 'foo', case-insensitive
find . -type f -exec grep -il 'foo' {} \;
Print all filenames under /proc and below
find /proc -exec ls '{}' \;
Print all filenames under /proc and below
find /proc -print0 | xargs -0
Print all filenames under /proc and below
find /proc | xargs
Print all lines from file 'report.txt' containing any-cased 'error' pattern
cat report.txt | grep -i error
Print all matching commands in $PATH for command "python"
which -a python
Print all non-hidden files in the current directory and its subdirectories
find . -not -path '*/\.*'
print all readline bindings
bind -P
Prints all Saturday days of a current month.
cal -h | cut -c19-20
Print all string from file 'file2.txt' matching pattern in file 'file1.txt'
grep "$(cat file1.txt)" file2.txt
Print all unique strings in $1.tmp file.
cat $1.tmp | sort -u
Print all user names and terminals of users who are logged in
who | cut -d " " -f1,2
Print and delete all directories named 'work' under '/usr/ports/' directory tree
find /usr/ports/ -name work -type d -print -exec rm -rf {} \;
Print and recursively remove the alphabetically last directory in the current directory
find -mindepth 1 -maxdepth 1 -type d | cut -c 3- | sort -k1n | tail -n 1 | xargs -r echo rm -r
Print and save the ping results of 25 requests to "google.com" in "/home/user/myLogFile.log" containing at most 100000 bytes
ping -c 25 google.com | tee >(split -d -b 100000 - /home/user/myLogFile.log)
print apparent size rather than disk usage
du -B1 --apparent-size /tmp/foo.txt
Print appended data in "/var/log/syslog" as the file grows
tail -f /var/log/syslog
Print appended data in "file" that match "my_pattern"
tail -f file | grep --line-buffered my_pattern
Print argument "$1" "$number" times
yes $1 | head -$number
Print as many dots as there are files named "file.ext" in the /home/kibab directory tree
find /home/kibab -name file.ext -exec echo . ';'
Print the average round trip time of 5 pings to "google.com"
ping -q -c 5 google.com | tail -n 1 | cut -f 5 -d '/'
Print the average round trip time of 5 pings to "google.com" from OSX
ping -c 5 google.com | grep "round-trip" | cut -f 5 -d "/"
Print base name of the file name without all extensions.
basename "$FILE" | cut -d'.' -f-1
print bindings for "p" and "e" with no case sensitivity
bind -p|grep -i '"[pE]"'
Print the byte count of all regular files found in the current directory tree
find . -type f | xargs | wc -c
Prints calendar for a current month.
cal
Print calendar for February, March and April of year 2009 side-by-side
paste <(cal 2 2009) <(cal 3 2009) <(cal 4 2009)
Prints calendar of February, 1900.
cal 2 1900
Prints calendars of July, 2009 and July, 2010 side-by-side.
paste <(cal 6 2009) <(cal 6 2010)
Print canonical filename of "/path/here/.."
readlink -f /path/here/..
Print canonical filename of "/path/there/../../" even if it does not exist
readlink -m /path/there/../../
Print characters 2 through 4 of "abcdefg"
echo 'abcdefg'|tail -c +2|head -c 3
Print the characters in $b that match with any character in $a without printing any newline
echo "$b" | grep -o "[$a]" | tr -d '\n'
Print the characters in $b that match with any character in $a without printing any whitespace in-between
echo "$b" | grep --only-matching "[$a]" | xargs | tr --delete ' '
Print characters in variable "$a" that exist in variable "$b"
echo "$(comm -12 <(echo "$a" | fold -w1 | sort | uniq) <(echo "$b" | fold -w1 | sort | uniq) | tr -d '\n')"
Print chmod commands that can change permissions of regular files residing in the current directory tree to u=rw,g=r,o=
find . -type f -exec echo chmod u=rw,g=r,o= '{}' \;
Print comma separated gaps in file "file" that contains new line separated ordered numbers
seq $(tail -1 file)|diff - file|grep -Po '.*(?=d)'
Print command history
history
Print command line of process with pid 17709
cat /proc/17709/cmdline | xargs -0 echo
Print command with PID 11383
ps | egrep 11383 | tr -s ' ' | cut -d ' ' -f 4
Print common files of directory "one" and "two"
comm -12 <(ls one) <(ls two)
Print common lines in "file1" and "file2"
comm -12 file1 file2
Print common lines in files "set1" and "set2"
comm -12 <(sort set1) <(sort set2)
Print common lines in sorted files "ignore.txt" and "input.txt"
comm -12 ignore.txt input.txt
Print common lines of files "file1", "file2", "file3", and "file4"
comm -12 <(comm -12 <(comm -12 <(sort file1) <(sort file2)) <(sort file3)) <(sort file4)
Print the compressed size, uncompressed size, compression ratio, and uncompressed filename of "file.zip"
gunzip -l file.zip
Print concatenated content of all files ending with '.foo' under the current folder
cat `find . -name '*.foo' -print`
Print the contents of "$FILE" starting from line 2
tail -n +2 "$FILE"
Print the contents of "${SPOOL_FILE}" file to the console and append to "${LOG_FILE}" file
cat ${SPOOL_FILE} | tee -a ${LOG_FILE}
Print the contents of "Little_Commas.TXT"
cat Little_Commas.TXT
Print contents of "file" as space separated hexadecimal bytes on a single line
od -t x1 -An file |tr -d '\n '
Print the contents of "file" in reverse order
nl file | sort -nr | cut -b8-
Print the contents of "filename"
cat filename
Print the contents of "foo.txt" starting with line 2
tail -n +2 foo.txt