GIT−SHELL - Online Linux Manual PageSection : 1
Updated : 2023−03−13
Source : Git 2​.40​.0
Note : Git Manual

NAMEgit-shell − Restricted login shell for Git−only SSH access

SYNOPSISchsh −s $(command −v git−shell) <user> git clone <user>@localhost:/path/to/repo​.git ssh <user>@localhost

DESCRIPTIONThis is a login shell for SSH accounts to provide restricted Git access​. It permits execution only of server−side Git commands implementing the pull/push functionality, plus custom commands present in a subdirectory named git−shell−commands in the users home directory​.

COMMANDSgit shell accepts the following commands after the −c option: git receive−pack <argument>, git upload−pack <argument>, git upload−archive <argument> Call the corresponding server−side command to support the clients git push, git fetch, or git archive −−remote request​. cvs server Imitate a CVS server​. See git-cvsserver(1)​. If a ~/git−shell−commands directory is present, git shell will also handle other, custom commands by running "git−shell−commands/<command> <arguments>" from the users home directory​.

INTERACTIVE USEBy default, the commands above can be executed only with the −c option; the shell is not interactive​. If a ~/git−shell−commands directory is present, git shell can also be run interactively (with no arguments)​. If a help command is present in the git−shell−commands directory, it is run to provide the user with an overview of allowed actions​. Then a "git> " prompt is presented at which one can enter any of the commands from the git−shell−commands directory, or exit to close the connection​. Generally this mode is used as an administrative interface to allow users to list repositories they have access to, create, delete, or rename repositories, or change repository descriptions and permissions​. If a no−interactive−login command exists, then it is run and the interactive shell is aborted​.

EXAMPLESTo disable interactive logins, displaying a greeting instead: $ chsh −s /usr/bin/git−shell $ mkdir $HOME/git−shell−commands $ cat >$HOME/git−shell−commands/no−interactive−login <<\EOF #!/bin/sh printf '%s\n' "Hi $USER! You've successfully authenticated, but I do not" printf '%s\n' "provide interactive shell access​." exit 128 EOF $ chmod +x $HOME/git−shell−commands/no−interactive−loginTo enable git−cvsserver access (which should generally have the no−interactive−login example above as a prerequisite, as creating the git−shell−commands directory allows interactive logins): $ cat >$HOME/git−shell−commands/cvs <<\EOF if ! test $# = 1 && test "$1" = "server" then echo >&2 "git−cvsserver only handles \"server\"" exit 1 fi exec git cvsserver server EOF $ chmod +x $HOME/git−shell−commands/cvs

SEE ALSOssh(1), git-daemon(1), contrib/git−shell−commands/README

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