mirror of
https://git.linuxfromscratch.org/lfs.git
synced 2025-01-19 05:27:39 +00:00
ea011f471c
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10188 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
104 lines
4.9 KiB
XML
104 lines
4.9 KiB
XML
<?xml version="1.0" encoding="ISO-8859-1"?>
|
|
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
|
|
<!ENTITY % general-entities SYSTEM "../general.ent">
|
|
<!ENTITY site SYSTEM "../appendices/rc.site.script">
|
|
%general-entities;
|
|
]>
|
|
|
|
<sect1 id="ch-scripts-site">
|
|
<?dbhtml filename="site.html"?>
|
|
|
|
<title>The rc.site File</title>
|
|
|
|
<indexterm zone="ch-scripts-site">
|
|
<primary sortas="a-rc.site">rc.site</primary>
|
|
</indexterm>
|
|
|
|
<para>The optional <filename>/etc/sysconfig/rc.site</filename> file contains
|
|
settings that are automatically set for each boot script. It can alternatively
|
|
set the values specified in the <filename>hostname</filename>,
|
|
<filename>console</filename>, and <filename>clock</filename> files in the
|
|
<filename class='directory'>/etc/sysconfig/</filename> directory. If the
|
|
associated variables are present in both these separate files and
|
|
<filename>rc.site</filename>, the values in the script specific files have
|
|
precedence. </para>
|
|
|
|
<para><filename>rc.site</filename> also contains parameters that can
|
|
customize other aspects of the boot process. Setting the IPROMPT variable
|
|
will enable selective running of bootscripts. Other options are described
|
|
in the file comments. The default version of the file is as follows:</para>
|
|
|
|
<!-- Use role to fix a pdf generation problem -->
|
|
<screen role="auto">&site;</screen>
|
|
|
|
<sect2>
|
|
<title>Customizing the Boot and Shutdown Scripts</title>
|
|
|
|
<para>The LFS boot scripts boot and shut down a system in a fairly
|
|
efficient manner, but there are a few tweaks that you can make in the
|
|
rc.site file to improve speed even more and to adjust messages according
|
|
to your preferences. To do this, adjust the settings in
|
|
the <filename>/etc/sysconfig/rc.site</filename> file above.</para>
|
|
|
|
<itemizedlist>
|
|
|
|
<listitem><para>During the boot script <filename>udev</filename>, there is
|
|
a call to <command>udev settle</command> that requires some time to
|
|
complete. This time may or may not be required depending on devices present
|
|
in the system. If you only have simple partitions and a single ethernet
|
|
card, the boot process will probably not need to wait for this command. To
|
|
skip it, set the variable OMIT_UDEV_SETTLE=y.</para></listitem>
|
|
|
|
<listitem><para>The boot script <filename>udev_retry</filename> also runs
|
|
<command>udev settle</command> by default. This command is only needed by
|
|
default if the <filename class='directory'>/var</filename> directory is
|
|
separately mounted. This is because the clock needs the file
|
|
<filename>/var/lib/hwclock/adjtime</filename>. Other customizations may
|
|
also need to wait for udev to complete, but in many installations it is not
|
|
needed. Skip the command by setting the variable OMIT_UDEV_RETRY_SETTLE=y.
|
|
</para></listitem>
|
|
|
|
<listitem><para>By default, the file system checks are silent. This can
|
|
appear to be a delay during the bootup process. To turn on the
|
|
<command>fsck</command> output, set the variable VERBOSE_FSCK=y.
|
|
</para></listitem>
|
|
|
|
<listitem><para>When rebooting, you may want to skip the filesystem check,
|
|
<command>fsck</command>, completely. To do this, either create the file
|
|
<filename>/fastboot</filename> or reboot the system with the command
|
|
<command>/sbin/shutdown -f -r now</command>. On the other hand, you can
|
|
force all file systems to be checked by creating
|
|
<filename>/forcefsck</filename> or running <command>shutdown</command> with
|
|
the <parameter>-F</parameter> parameter instead of <parameter>-f</parameter>.
|
|
</para>
|
|
|
|
<para>Setting the variable FASTBOOT=y will disable <command>fsck</command>
|
|
during the boot process until it is removed. This is not recommended
|
|
on a permanent basis.</para></listitem>
|
|
|
|
<listitem><para>Normally, all files in the <filename
|
|
class='directory'>/tmp</filename> directory are deleted at boot time.
|
|
Depending on the number of files or directories present, this can cause a
|
|
noticeable delay in the boot process. To skip removing these files set the
|
|
variable SKIPTMPCLEAN=y.</para></listitem>
|
|
|
|
<listitem><para>During shutdown, the <command>init</command> program sends
|
|
a TERM signal to each program it has started (e.g. agetty), waits for a set
|
|
time (default 3 seconds), and sends each process a KILL signal and waits
|
|
again. This process is repeated in the <command>sendsignals</command>
|
|
script for any processes that are not shut down by their own scripts. The
|
|
delay for <command>init</command> can be set by passing a parameter. For
|
|
example to remove the delay in <command>init</command>, pass the -t0
|
|
parameter when shutting down or rebooting (e.g. <command>/sbin/shutdown
|
|
-t0 -r now</command>). The delay for the <command>sendsignals</command>
|
|
script can be skipped by setting the parameter
|
|
KILLDELAY=0.</para></listitem>
|
|
|
|
</itemizedlist>
|
|
|
|
</sect2>
|
|
|
|
</sect1>
|
|
|