diff options
Diffstat (limited to 'chapter07/usage.xml')
| -rw-r--r-- | chapter07/usage.xml | 79 |
1 files changed, 77 insertions, 2 deletions
diff --git a/chapter07/usage.xml b/chapter07/usage.xml index 334c471b7..a679381c5 100644 --- a/chapter07/usage.xml +++ b/chapter07/usage.xml @@ -37,7 +37,80 @@ 5: same as 4, it is usually used for GUI login (like X's <command>xdm</command> or KDE's <command>kdm</command>) 6: reboot the computer</literallayout> - <para>The command used to change run-levels is <command>init + <sect2 id="conf-sysvinit" role="configuration"> + <title>Configuring Sysvinit</title> + + <indexterm zone="conf-sysvinit"> + <primary sortas="a-Sysvinit">Sysvinit</primary> + <secondary>configuring</secondary> + </indexterm> + + <indexterm zone="conf-sysvinit"> + <primary sortas="e-/etc/inittab">/etc/inittab</primary> + </indexterm> + + <para>During the kernel initialization, the first program that is run + is either specified on the command line or, by default + <command>init</command>. This program reads the initialization file + <filename>/etc/inittab</filename>. Create this file with:</para> + +<screen><userinput>cat > /etc/inittab << "EOF" +<literal># Begin /etc/inittab + +id:3:initdefault: + +si::sysinit:/etc/rc.d/init.d/rc sysinit + +l0:0:wait:/etc/rc.d/init.d/rc 0 +l1:S1:wait:/etc/rc.d/init.d/rc 1 +l2:2:wait:/etc/rc.d/init.d/rc 2 +l3:3:wait:/etc/rc.d/init.d/rc 3 +l4:4:wait:/etc/rc.d/init.d/rc 4 +l5:5:wait:/etc/rc.d/init.d/rc 5 +l6:6:wait:/etc/rc.d/init.d/rc 6 + +ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now + +su:S016:once:/sbin/sulogin + +1:2345:respawn:/sbin/agetty tty1 9600 +2:2345:respawn:/sbin/agetty tty2 9600 +3:2345:respawn:/sbin/agetty tty3 9600 +4:2345:respawn:/sbin/agetty tty4 9600 +5:2345:respawn:/sbin/agetty tty5 9600 +6:2345:respawn:/sbin/agetty tty6 9600 + +# End /etc/inittab</literal> +EOF</userinput></screen> + + <para>An explanation of this initialization file is in the man page for + <emphasis>inittab</emphasis>. For LFS, the key command that is run is + <command>rc</command>. The intialization file above will instruct + <command>rc</command> to run all the scripts starting with an S in the + <filename class="directory">/etc/rc.d/rcsysinit.d</filename> directory + followed by all the scripts starting with an S in the <filename + class="directory">/etc/rc.d/rc?.d</filename> directory where the question + mark is specified by the initdefault value.</para> + + <para>As a convenience, the <command>rc</command> script reads a library of + functions in <filename class="directory">/lib/boot/functions</filename>. + This library also reads an optional configuration file, + <filename>/etc/sysconfig/init_params</filename>. Any of the system + configuration file parameters described in subsequent sections can be + alternatively placed in this file allowing consolidation of all system + parameters in thsi one file.</para> + + <para>As a debugging convenience, the functions script also logs all output + to <filename>/run/var/bootlog</filename>. Since the <filename + class="directory">/run</filename> directory is a tmpfs, this file is not + persistent across boots.</para> + + </sect2> + + <sect2 id="init-levels" > + <title>Changing Run Levels</title> + + <para>Changing run-levels is done with <command>init <replaceable><runlevel></replaceable></command>, where <replaceable><runlevel></replaceable> is the target run-level. For example, to reboot the computer, a user could issue the <command>init 6</command> command, @@ -59,7 +132,7 @@ <para>The real scripts are in <filename class="directory">/etc/rc.d/init.d</filename>. They do the actual work, and - the symlinks all point to them. Killing links and starting links point to + the symlinks all point to them. K links and S links point to the same script in <filename class="directory">/etc/rc.d/init.d</filename>. This is because the scripts can be called with different parameters like <parameter>start</parameter>, <parameter>stop</parameter>, @@ -126,4 +199,6 @@ it is your own LFS system). The files given here are an example of how it can be done.</para> + </sect2> + </sect1> |