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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>systemd-ask-password</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style>
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</style><a href="index.html">Index </a>·
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<a href="systemd.directives.html">Directives </a>·
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<a href="../python-systemd/index.html">Python </a>·
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<a href="../libudev/index.html">libudev </a>·
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<a href="../libudev/index.html">gudev </a><span style="float:right">systemd 219</span><hr><div class="refentry"><a name="systemd-ask-password"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>systemd-ask-password — Query the user for a system password</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="cmdsynopsis"><p><code class="command">systemd-ask-password [OPTIONS...] [MESSAGE]</code> </p></div></div><div class="refsect1"><a name="idm140324624283792"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p><span class="command"><strong>systemd-ask-password</strong></span> may be used to query
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a system password or passphrase from the user, using a question
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message specified on the command line. When run from a TTY it will
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query a password on the TTY and print it to standard output. When
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run with no TTY or with <code class="option">--no-tty</code> it will query
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the password system-wide and allow active users to respond via
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several agents. The latter is only available to privileged
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processes.</p><p>The purpose of this tool is to query system-wide passwords
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-- that is passwords not attached to a specific user account.
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Examples include: unlocking encrypted hard disks when they are
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plugged in or at boot, entering an SSL certificate passphrase for
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web and VPN servers.</p><p>Existing agents are: a boot-time password agent asking the
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user for passwords using Plymouth; a boot-time password agent
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querying the user directly on the console; an agent requesting
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password input via a
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<a href="http://man7.org/linux/man-pages/man1/wall.1.html"><span class="citerefentry"><span class="refentrytitle">wall</span>(1)</span></a>
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message; an agent suitable for running in a GNOME session; a
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command line agent which can be started temporarily to process
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queued password requests; a TTY agent that is temporarily spawned
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during
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<a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(1)</span></a>
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invocations.</p><p>Additional password agents may be implemented according to
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the <a class="ulink" href="http://www.freedesktop.org/wiki/Software/systemd/PasswordAgents" target="_top">systemd
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Password Agent Specification</a>.</p><p>If a password is queried on a TTY, the user may press TAB to
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hide the asterisks normally shown for each character typed.
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Pressing Backspace as first key achieves the same effect.</p></div><div class="refsect1"><a name="idm140324620533328"></a><h2 id="Options">Options<a class="headerlink" title="Permalink to this headline" href="#Options">¶</a></h2><p>The following options are understood:</p><div class="variablelist"><dl class="variablelist"><dt id="--icon="><span class="term"><code class="option">--icon=</code></span><a class="headerlink" title="Permalink to this term" href="#--icon=">¶</a></dt><dd><p>Specify an icon name alongside the password
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query, which may be used in all agents supporting graphical
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display. The icon name should follow the <a class="ulink" href="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html" target="_top">XDG
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Icon Naming Specification</a>.</p></dd><dt id="--timeout="><span class="term"><code class="option">--timeout=</code></span><a class="headerlink" title="Permalink to this term" href="#--timeout=">¶</a></dt><dd><p>Specify the query timeout in seconds. Defaults
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to 90s. A timeout of 0 waits indefinitely. </p></dd><dt id="--echo"><span class="term"><code class="option">--echo</code></span><a class="headerlink" title="Permalink to this term" href="#--echo">¶</a></dt><dd><p>Echo the user input instead of masking it.
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This is useful when using
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<code class="filename">systemd-ask-password</code> to query for
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usernames. </p></dd><dt id="--no-tty"><span class="term"><code class="option">--no-tty</code></span><a class="headerlink" title="Permalink to this term" href="#--no-tty">¶</a></dt><dd><p>Never ask for password on current TTY even if
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one is available. Always use agent system.</p></dd><dt id="--accept-cached"><span class="term"><code class="option">--accept-cached</code></span><a class="headerlink" title="Permalink to this term" href="#--accept-cached">¶</a></dt><dd><p>If passed, accept cached passwords, i.e.
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passwords previously typed in.</p></dd><dt id="--multiple"><span class="term"><code class="option">--multiple</code></span><a class="headerlink" title="Permalink to this term" href="#--multiple">¶</a></dt><dd><p>When used in conjunction with
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<code class="option">--accept-cached</code> accept multiple passwords.
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This will output one password per line.</p></dd><dt id="-h"><span class="term"><code class="option">-h</code>, </span><span class="term"><code class="option">--help</code></span><a class="headerlink" title="Permalink to this term" href="#-h">¶</a></dt><dd><p><a name="help-text"></a>Print a short help text and exit.
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</p></dd></dl></div></div><div class="refsect1"><a name="idm140324620519952"></a><h2 id="Exit status">Exit status<a class="headerlink" title="Permalink to this headline" href="#Exit%20status">¶</a></h2><p>On success, 0 is returned, a non-zero failure code
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otherwise.</p></div><div class="refsect1"><a name="idm140324624422736"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p>
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<a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>,
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<a href="systemctl.html"><span class="citerefentry"><span class="refentrytitle">systemctl</span>(1)</span></a>,
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<a href="http://linux.die.net/man/8/plymouth"><span class="citerefentry"><span class="refentrytitle">plymouth</span>(8)</span></a>,
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<a href="http://man7.org/linux/man-pages/man1/wall.1.html"><span class="citerefentry"><span class="refentrytitle">wall</span>(1)</span></a>
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</p></div></div></body></html>
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