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 440 </head>
 441 <body class="manpage">
 442 <div id="header">
 443 <h1>git-shell(1) Manual Page</h1>
 444 <h2 id="_name">NAME</h2>
 445 <div class="sectionbody">
 446 <p>git-shell - Restricted login shell for Git-only SSH access</p>
 447 </div>
 448 </div>
 449 <div id="content">
 450 <div class="sect1">
 451 <h2 id="_synopsis">SYNOPSIS</h2>
 452 <div class="sectionbody">
 453 <div class="verseblock">
 454 <pre class="content"><em>chsh</em> -s $(command -v git-shell) &lt;user&gt;
 455 <em>git clone</em> &lt;user&gt;<code>@localhost:/path/to/repo.git</code>
 456 <em>ssh</em> &lt;user&gt;<code>@localhost</code></pre>
 457 </div>
 458 </div>
 459 </div>
 460 <div class="sect1">
 461 <h2 id="_description">DESCRIPTION</h2>
 462 <div class="sectionbody">
 463 <div class="paragraph">
 464 <p>This is a login shell for SSH accounts to provide restricted Git access.
 465 It permits execution only of server-side Git commands implementing the
 466 pull/push functionality, plus custom commands present in a subdirectory
 467 named <code>git-shell-commands</code> in the user&#8217;s home directory.</p>
 468 </div>
 469 </div>
 470 </div>
 471 <div class="sect1">
 472 <h2 id="_commands">COMMANDS</h2>
 473 <div class="sectionbody">
 474 <div class="paragraph">
 475 <p><em>git shell</em> accepts the following commands after the <code>-c</code> option:</p>
 476 </div>
 477 <div class="dlist">
 478 <dl>
 479 <dt class="hdlist1"><em>git receive-pack &lt;argument&gt;</em></dt>
 480 <dt class="hdlist1"><em>git upload-pack &lt;argument&gt;</em></dt>
 481 <dt class="hdlist1"><em>git upload-archive &lt;argument&gt;</em></dt>
 482 <dd>
 483 <p>Call the corresponding server-side command to support
 484 the client&#8217;s <em>git push</em>, <em>git fetch</em>, or <em>git archive --remote</em>
 485 request.</p>
 486 </dd>
 487 <dt class="hdlist1"><em>cvs server</em></dt>
 488 <dd>
 489 <p>Imitate a CVS server.  See <a href="git-cvsserver.html">git-cvsserver(1)</a>.</p>
 490 </dd>
 491 </dl>
 492 </div>
 493 <div class="paragraph">
 494 <p>If a <code>~/git-shell-commands</code> directory is present, <em>git shell</em> will
 495 also handle other, custom commands by running
 496 "<code>git-shell-commands/</code><em>&lt;command&gt;</em> <em>&lt;arguments&gt;</em>" from the user&#8217;s home
 497 directory.</p>
 498 </div>
 499 </div>
 500 </div>
 501 <div class="sect1">
 502 <h2 id="_interactive_use">INTERACTIVE USE</h2>
 503 <div class="sectionbody">
 504 <div class="paragraph">
 505 <p>By default, the commands above can be executed only with the <code>-c</code>
 506 option; the shell is not interactive.</p>
 507 </div>
 508 <div class="paragraph">
 509 <p>If a <code>~/git-shell-commands</code> directory is present, <em>git shell</em>
 510 can also be run interactively (with no arguments).  If a <code>help</code>
 511 command is present in the <code>git-shell-commands</code> directory, it is
 512 run to provide the user with an overview of allowed actions.  Then a
 513 "git&gt; " prompt is presented at which one can enter any of the
 514 commands from the <code>git-shell-commands</code> directory, or <code>exit</code> to close
 515 the connection.</p>
 516 </div>
 517 <div class="paragraph">
 518 <p>Generally this mode is used as an administrative interface to allow
 519 users to list repositories they have access to, create, delete, or
 520 rename repositories, or change repository descriptions and
 521 permissions.</p>
 522 </div>
 523 <div class="paragraph">
 524 <p>If a <code>no-interactive-login</code> command exists, then it is run and the
 525 interactive shell is aborted.</p>
 526 </div>
 527 </div>
 528 </div>
 529 <div class="sect1">
 530 <h2 id="_examples">EXAMPLES</h2>
 531 <div class="sectionbody">
 532 <div class="paragraph">
 533 <p>To disable interactive logins, displaying a greeting instead:</p>
 534 </div>
 535 <div class="listingblock">
 536 <div class="content">
 537 <pre>$ chsh -s /usr/bin/git-shell
 538 $ mkdir $HOME/git-shell-commands
 539 $ cat &gt;$HOME/git-shell-commands/no-interactive-login &lt;&lt;\EOF
 540 #!/bin/sh
 541 printf '%s\n' "Hi $USER! You've successfully authenticated, but I do not"
 542 printf '%s\n' "provide interactive shell access."
 543 exit 128
 544 EOF
 545 $ chmod +x $HOME/git-shell-commands/no-interactive-login</pre>
 546 </div>
 547 </div>
 548 <div class="paragraph">
 549 <p>To enable git-cvsserver access (which should generally have the
 550 <code>no-interactive-login</code> example above as a prerequisite, as creating
 551 the git-shell-commands directory allows interactive logins):</p>
 552 </div>
 553 <div class="listingblock">
 554 <div class="content">
 555 <pre>$ cat &gt;$HOME/git-shell-commands/cvs &lt;&lt;\EOF
 556 if ! test $# = 1 &amp;&amp; test "$1" = "server"
 557 then
 558         echo &gt;&amp;2 "git-cvsserver only handles \"server\""
 559         exit 1
 560 fi
 561 exec git cvsserver server
 562 EOF
 563 $ chmod +x $HOME/git-shell-commands/cvs</pre>
 564 </div>
 565 </div>
 566 </div>
 567 </div>
 568 <div class="sect1">
 569 <h2 id="_see_also">SEE ALSO</h2>
 570 <div class="sectionbody">
 571 <div class="paragraph">
 572 <p>ssh(1),
 573 <a href="git-daemon.html">git-daemon(1)</a>,
 574 contrib/git-shell-commands/README</p>
 575 </div>
 576 </div>
 577 </div>
 578 <div class="sect1">
 579 <h2 id="_git">GIT</h2>
 580 <div class="sectionbody">
 581 <div class="paragraph">
 582 <p>Part of the <a href="git.html">git(1)</a> suite</p>
 583 </div>
 584 </div>
 585 </div>
 586 </div>
 587 <div id="footer">
 588 <div id="footer-text">
 589 Last updated 2020-03-10 15:02:33 -0700
 590 </div>
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 592 </body>
 593 </html>