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64 lines
3.4 KiB
Markdown
64 lines
3.4 KiB
Markdown
# SFTP subsystem mode
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In this mode SFTPGo speaks the server side of SFTP protocol to stdout and expects client requests from stdin.
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You can use SFTPGo as subsystem via the `startsubsys` command.
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This mode is not intended to be called directly, but from sshd using the `Subsystem` option.
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For example adding a line like this one in `/etc/ssh/sshd_config`:
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```shell
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Subsystem sftp sftpgo startsubsys
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```
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Command-line flags should be specified in the Subsystem declaration.
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```shell
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Usage:
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sftpgo startsubsys [flags]
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Flags:
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-d, --base-home-dir string If the user does not exist specify an alternate
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starting directory. The home directory for a new
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user will be:
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<base-home-dir>/<username>
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base-home-dir must be an absolute path.
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-c, --config-dir string Location for SFTPGo config dir. This directory
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should contain the "sftpgo" configuration file
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or the configured config-file and it is used as
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the base for files with a relative path (eg. the
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private keys for the SFTP server, the SQLite
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database if you use SQLite as data provider).
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This flag can be set using SFTPGO_CONFIG_DIR
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env var too. (default ".")
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-f, --config-file string Name for SFTPGo configuration file. It must be
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the name of a file stored in config-dir not the
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absolute path to the configuration file. The
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specified file name must have no extension we
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automatically load JSON, YAML, TOML, HCL and
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Java properties. Therefore if you set "sftpgo"
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then "sftpgo.json", "sftpgo.yaml" and so on
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are searched.
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This flag can be set using SFTPGO_CONFIG_FILE
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env var too. (default "sftpgo")
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-h, --help help for startsubsys
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-j, --log-to-journald Send logs to journald. Only available on Linux.
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Use:
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$ journalctl -o verbose -f
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To see full logs.
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If not set, the logs will be sent to the standard
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error
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-v, --log-verbose Enable verbose logs. This flag can be set
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using SFTPGO_LOG_VERBOSE env var too.
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(default true)
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-p, --preserve-home If the user already exists, the existing home
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directory will not be changed
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```
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In this mode `bolt` and `sqlite` providers are not usable as the same database file cannot be shared among multiple processes, if one of these provider is configured it will be automatically changed to `memory` provider.
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The username and home directory for the logged in user are determined using [user.Current()](https://golang.org/pkg/os/user/#Current).
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If the user who is logging is not found within the SFTPGo data provider, it is added automatically.
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You can pre-configure the users inside the SFTPGo data provider, this way you can use a different home directory, restrict permissions and such.
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