| #https://www.notion.so/n8n/Frontmatter-432c2b8dff1f43d4b1c8d20075510fe4 | |
| title: Source control environment variables | |
| description: Environment variable to set the default SSH key type for source control setup. | |
| contentType: reference | |
| tags: | |
| - environment variables | |
| hide: | |
| - toc | |
| - tags | |
| # Source control environment variables | |
| --8<-- "_snippets/self-hosting/file-based-configuration.md" | |
| n8n uses Git-based source control to support environments. Refer to [Source control and environments](/source-control-environments/setup.md) for more information on how to link a Git repository to an n8n instance and configure your source control. | |
| | Variable | Type | Default | Description | | |
| | :------- | :---- | :------- | :---------- | | |
| | `N8N_SOURCECONTROL_DEFAULT_SSH_KEY_TYPE` | String | `ed25519` | Set to `rsa` to make RSA the default SSH key type for [Source control setup](/source-control-environments/setup.md). | | |