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-<!--
- SPDX-License-Identifier: LGPL-2.1+
-
- Copyright 2014 Lennart Poettering
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+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+<!-- SPDX-License-Identifier: LGPL-2.1+ -->
<refentry id="systemd-debug-generator">
<refentryinfo>
<title>systemd-debug-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>
that reads the kernel command line and understands three
options:</para>
- <para>If the <option>systemd.mask=</option> option is specified
- and followed by a unit name, this unit is masked for the runtime,
- similar to the effect of
+ <para>If the <option>systemd.mask=</option> or <option>rd.systemd.mask=</option>
+ option is specified and followed by a unit name, this unit is
+ masked for the runtime, similar to the effect of
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
<command>mask</command> command. This is useful to boot with
certain units removed from the initial boot transaction for
- debugging system startup. May be specified more than once.</para>
+ debugging system startup. May be specified more than once.
+ <option>rd.systemd.mask=</option> is honored only by initial
+ RAM disk (initrd) while <option>systemd.mask=</option> is
+ honored only in the main system.</para>
- <para>If the <option>systemd.wants=</option> option is specified
+ <para>If the <option>systemd.wants=</option> or
+ <option>rd.systemd.wants=</option> option is specified
and followed by a unit name, a start job for this unit is added to
the initial transaction. This is useful to start one or more
- additional units at boot. May be specified more than once.</para>
+ additional units at boot. May be specified more than once.
+ <option>rd.systemd.wants=</option> is honored only by initial
+ RAM disk (initrd) while <option>systemd.wants=</option> is
+ honored only in the main system.</para>
- <para>If the <option>systemd.debug_shell</option> option is
+ <para>If the <option>systemd.debug_shell</option> or
+ <option>rd.systemd.debug_shell</option> option is
specified, the debug shell service
<literal>debug-shell.service</literal> is pulled into the boot
transaction. It will spawn a debug shell on tty9 during early
system startup. Note that the shell may also be turned on
persistently by enabling it with
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
- <command>enable</command> command.</para>
+ <command>enable</command> command.
+ <option>rd.systemd.debug_shell=</option> is honored only by initial
+ RAM disk (initrd) while <option>systemd.debug_shell</option> is
+ honored only in the main system.</para>
<para><filename>systemd-debug-generator</filename> implements
<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>