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<?xml version="1.0"?>
<!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!--
This file is part of systemd.
Copyright 2012 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd-getty-generator">
<refentryinfo>
<title>systemd-getty-generator</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Lennart</firstname>
<surname>Poettering</surname>
<email>lennart@poettering.net</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-getty-generator</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-getty-generator</refname>
<refpurpose>Generator for enabling getty instances on
the console</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/usr/lib/systemd/system-generators/systemd-getty-generator</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><filename>systemd-getty-generator</filename> is
a generator that automatically instantiates
<filename>serial-getty@.service</filename> on the
kernel console <filename>/dev/console</filename> if
that is not directed to the virtual console
subsystem. It will also instantiate
<filename>serial-getty@.service</filename> instances
for virtualizer consoles, if execution in a
virtualized environment is detected. Finally, it will
instantiate
<filename>container-getty@.service</filename>
instances for additional container pseudo TTYs as
requested by the container manager (see <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface/"><filename>Container Interface</filename></ulink>). This
should ensure that the user is shown a login prompt at
the right place, regardless of which environment the
system is started in. For example, it is sufficient to
redirect the kernel console with a kernel command line
argument such as <varname>console=</varname> to get
both kernel messages and a getty prompt on a serial
TTY. See <ulink
url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink>
for more information on the
<varname>console=</varname> kernel parameter.</para>
<para><filename>systemd-getty-generator</filename>
implements the <ulink
url="http://www.freedesktop.org/wiki/Software/systemd/Generators">generator
specification</ulink>.</para>
<para>Further information about configuration of
gettys you may find in <ulink
url="http://0pointer.de/blog/projects/serial-console.html">systemd
for Administrators, Part XVI: Gettys on Serial
Consoles (and Elsewhere)</ulink>.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry project='man-pages'><refentrytitle>agetty</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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