<?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 2010 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 Lesser General Public License for more details. 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="runlevel"> <refentryinfo> <title>runlevel</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>runlevel</refentrytitle> <manvolnum>8</manvolnum> </refmeta> <refnamediv> <refname>runlevel</refname> <refpurpose>Print previous and current SysV runlevel</refpurpose> </refnamediv> <refsynopsisdiv> <cmdsynopsis> <command>runlevel <arg choice="opt" rep="repeat">options</arg></command> </cmdsynopsis> </refsynopsisdiv> <refsect1> <title>Description</title> <para><command>runlevel</command> prints the previous and current SysV runlevel if they are known.</para> <para>The two runlevel characters are separated by a single space character. If a runlevel cannot be determined, N is printed instead. If neither can be determined, the word "unknown" is printed.</para> <para>Unless overridden in the environment, this will check the utmp database for recent runlevel changes.</para> </refsect1> <refsect1> <title>Options</title> <para>The following option is understood:</para> <variablelist> <varlistentry> <term><option>--help</option></term> <listitem><para>Prints a short help text and exits.</para></listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>Exit status</title> <para>If one or both runlevels could be determined, 0 is returned, a non-zero failure code otherwise.</para> </refsect1> <refsect1> <title>Environment</title> <variablelist class='environment-variables'> <varlistentry> <term><varname>$RUNLEVEL</varname></term> <listitem><para>If <varname>$RUNLEVEL</varname> is set, <command>runlevel</command> will print this value as current runlevel and ignore utmp.</para></listitem> </varlistentry> <varlistentry> <term><varname>$PREVLEVEL</varname></term> <listitem><para>If <varname>$PREVLEVEL</varname> is set <command>runlevel</command> will print this value as previous runlevel and ignore utmp.</para></listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>Files</title> <variablelist> <varlistentry> <term><filename>/var/run/utmp</filename></term> <listitem><para>The utmp database <command>runlevel</command> reads the previous and current runlevel from.</para></listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>Notes</title> <para>This is a legacy command available for compatibility only. It should not be used anymore, as the concept of runlevels is obsolete.</para> </refsect1> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry> </para> </refsect1> </refentry>