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Diffstat (limited to 'chapter06/sysvinit.xml')
| -rw-r--r-- | chapter06/sysvinit.xml | 172 |
1 files changed, 6 insertions, 166 deletions
diff --git a/chapter06/sysvinit.xml b/chapter06/sysvinit.xml index 47d078778..8148dc672 100644 --- a/chapter06/sysvinit.xml +++ b/chapter06/sysvinit.xml @@ -28,13 +28,7 @@ running, and shutdown of your system.</para> <sect2 role="installation"> <title>Installation of Sysvinit</title> -<para>When run-levels are changed (for example, when halting the system), -<command>init</command> sends termination signals to those processes that -<command>init</command> itself started and that shouldn't be running in the new -run-level. While doing this, <command>init</command> outputs messages like -<quote>Sending processes the TERM signal</quote> which seem to imply that it is sending these signals to all currently running processes. To avoid this -misinterpretation, you can modify the source so that these messages read like -<quote>Sending processes started by init the TERM signal</quote> instead:</para> +<para>Issue a sed sustitution:</para> <screen><userinput>sed -i 's@Sending processes@& started by init@g' \ src/init.c</userinput></screen> @@ -51,14 +45,8 @@ misinterpretation, you can modify the source so that these messages read like <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>Create a new <filename>/etc/inittab</filename> file by running the -following:</para> +<para>Create a <filename>/etc/inittab</filename> file:</para> <screen><userinput>cat > /etc/inittab << "EOF" # Begin /etc/inittab @@ -89,172 +77,24 @@ su:S016:once:/sbin/sulogin # End /etc/inittab EOF</userinput></screen> -<para> The <parameter>-I '\033(K'</parameter> switch tells <command>agetty</command> to send this escape sequence to -the terminal before doing anything else. This escape sequence switches the -console character set to a user-defined one, which can be modified by -running the <command>setfont</command> program. -Actually, the <command>console</command> initscript from the LFS-Bootscripts -package calls the <command>setfont</command> program during system -startup. Sending this escape sequence is necessary for -people who use non-ISO-8859-1 screen font, but does not hurt native English -speakers.</para> - </sect2> <sect2 id="contents-sysvinit" role="content"><title>Contents of Sysvinit</title> -<segmentedlist> -<segtitle>Installed programs</segtitle> -<seglistitem><seg>halt, init, killall5, last, lastb (link to last), mesg, pidof (link to -killall5), poweroff (link to halt), reboot (link to halt), runlevel, shutdown, sulogin, telinit -(link to init), utmpdump and wall</seg></seglistitem> -</segmentedlist> - -<variablelist><title>Short descriptions</title> - -<varlistentry id="halt"> -<term><command>halt</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit halt"><primary sortas="b-halt">halt</primary></indexterm> -<para>normally invokes <command>shutdown</command> with the <parameter>-h</parameter> flag, -except when already in run-level 0, then it tells the kernel to halt the system. -But first it notes in the file <filename>/var/log/wtmp</filename> that the -system is being brought down.</para> -</listitem> -</varlistentry> - -<varlistentry id="init"> -<term><command>init</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit init"><primary sortas="b-init">init</primary></indexterm> -<para>is the mother of all processes. It reads its -commands from <filename>/etc/inittab</filename>, which normally tell it which -scripts to run for which run-level, and how many gettys to spawn.</para> -</listitem> -</varlistentry> - -<varlistentry id="killall5"> -<term><command>killall5</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit killall5"><primary sortas="b-killall5">killall5</primary></indexterm> -<para>sends a signal to all processes, except the processes in its own session -- -so it won't kill the shell running the script that called it.</para> -</listitem> -</varlistentry> - -<varlistentry id="last"> -<term><command>last</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit last"><primary sortas="b-last">last</primary></indexterm> -<para>shows which users last logged in (and out), -searching back through the file <filename>/var/log/wtmp</filename>. It can -also show system boots and shutdowns, and run-level changes.</para> -</listitem> -</varlistentry> - -<varlistentry id="lastb"> -<term><command>lastb</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit lastb"><primary sortas="b-lastb">lastb</primary></indexterm> -<para>shows the failed login attempts, as logged in -<filename>/var/log/btmp</filename>.</para> -</listitem> -</varlistentry> +<para>See testing</para> -<varlistentry id="mesg"> -<term><command>mesg</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit mesg"><primary sortas="b-mesg">mesg</primary></indexterm> -<para>controls whether other users can send -messages to the current user's terminal.</para> -</listitem> -</varlistentry> +<!-- This should be added to testing: <varlistentry id="mountpoint"> <term><command>mountpoint</command></term> <listitem> +<para>Checks if the directory is a mountpoint</para> <indexterm zone="ch-system-sysvinit mountpoint"><primary sortas="b-mountpoint">mountpoint</primary></indexterm> -<para>checks if the directory is a mountpoint.</para> -</listitem> -</varlistentry> - -<varlistentry id="pidof"> -<term><command>pidof</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit pidof"><primary sortas="b-pidof">pidof</primary></indexterm> -<para>reports the PIDs of the given programs.</para> </listitem> </varlistentry> -<varlistentry id="poweroff"> -<term><command>poweroff</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit poweroff"><primary sortas="b-poweroff">poweroff</primary></indexterm> -<para>tells the kernel to halt the system and -switch off the computer. But see <command>halt</command>.</para> -</listitem> -</varlistentry> - -<varlistentry id="reboot"> -<term><command>reboot</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit reboot"><primary sortas="b-reboot">reboot</primary></indexterm> -<para>tells the kernel to reboot the system. But see <command>halt</command>.</para> -</listitem> -</varlistentry> - -<varlistentry id="runlevel"> -<term><command>runlevel</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit runlevel"><primary sortas="b-runlevel">runlevel</primary></indexterm> -<para>reports the previous and the current run-level, as noted in the last run-level -record in <filename>/var/run/utmp</filename>.</para> -</listitem> -</varlistentry> - -<varlistentry id="shutdown"> -<term><command>shutdown</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit shutdown"><primary sortas="b-shutdown">shutdown</primary></indexterm> -<para>brings the system down in a secure way, -signaling all processes and notifying all logged-in users.</para> -</listitem> -</varlistentry> - -<varlistentry id="sulogin"> -<term><command>sulogin</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit sulogin"><primary sortas="b-sulogin">sulogin</primary></indexterm> -<para>allows the superuser to log in. It is -normally invoked by <command>init</command> when the system goes into single user mode.</para> -</listitem> -</varlistentry> - -<varlistentry id="telinit"> -<term><command>telinit</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit telinit"><primary sortas="b-telinit">telinit</primary></indexterm> -<para>tells <command>init</command> which run-level to enter.</para> -</listitem> -</varlistentry> - -<varlistentry id="utmpdump"> -<term><command>utmpdump</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit utmpdump"><primary sortas="b-utmpdump">utmpdump</primary></indexterm> -<para>displays the content of the given login file in a friendlier format.</para> -</listitem> -</varlistentry> - -<varlistentry id="wall"> -<term><command>wall</command></term> -<listitem> -<indexterm zone="ch-system-sysvinit wall"><primary sortas="b-wall">wall</primary></indexterm> -<para>writes a message to all logged-in users.</para> -</listitem> -</varlistentry> -</variablelist> +--> </sect2> |