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87 lines
3.4 KiB
XML
87 lines
3.4 KiB
XML
<sect2><title>Contents of Sysvinit-&sysvinit-contversion;</title>
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<sect3><title>Program Files</title>
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<para>halt, init, killall5, last, lastb (link to last), mesg, pidof
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(link to killall5), poweroff (link to halt), reboot (link to halt),
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runlevel, shutdown, sulogin, telinit (link to init), utmpdump and
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wall</para></sect3>
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<sect3><title>Descriptions</title>
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<sect4><title>halt</title>
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<para>halt notes that the system is being brought down in the file
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/var/log/wtmp, and then either tells the kernel to halt, reboot or
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poweroff the system. If halt or reboot is called when the system is not
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in runlevel 0 or 6, shutdown will be invoked instead (with
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the flag -h or -r).</para></sect4>
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<sect4><title>init</title>
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<para>init is the parent of all processes. Its primary role is to create
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processes from a script stored in the file /etc/inittab. This
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file usually has entries which cause init to spawn gettys on each line that
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users can log in. It also controls autonomous processes required by any
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particular system.</para></sect4>
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<sect4><title>killall5</title>
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<para>killall5 is the SystemV killall command. It sends a signal to all
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processes except the processes in its own session, so it won't kill the
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shell that is running the script it was called from.</para></sect4>
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<sect4><title>last</title>
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<para>last searches back through the file /var/log/wtmp (or the file designated
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by the -f flag) and displays a list of all users logged in (and out)
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since that file was created.</para></sect4>
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<sect4><title>lastb</title>
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<para>lastb is the same as last, except that by default it shows a log of the
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file /var/log/btmp, which contains all the bad login attempts.</para></sect4>
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<sect4><title>mesg</title>
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<para>mesg controls the access to the user's terminal by others. It's typically
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used to allow or disallow other users to write to his terminal.</para></sect4>
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<sect4><title>pidof</title>
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<para>pidof displays the process identifiers (PIDs) of the named
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programs.</para></sect4>
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<sect4><title>poweroff</title>
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<para>poweroff is equivalent to shutdown -h -p now. It halts the computer and
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switches off the computer (when using an APM compliant BIOS and APM is
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enabled in the kernel).</para></sect4>
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<sect4><title>reboot</title>
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<para>reboot is equivalent to shutdown -r now. It reboots
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the computer.</para></sect4>
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<sect4><title>runlevel</title>
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<para>runlevel reads the system utmp file (typically /var/run/utmp) to locate
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the runlevel record, and then prints the previous and current system
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runlevel on its standard output, separated by a single space.</para></sect4>
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<sect4><title>shutdown</title>
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<para>shutdown brings the system down in a secure way. All logged-in users are
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notified that the system is going down, and login is blocked.</para></sect4>
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<sect4><title>sulogin</title>
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<para>sulogin is invoked by init when the system goes into single user mode
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(this is done through an entry in /etc/inittab). Init also tries to
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execute sulogin when it is passed the -b flag from the boot loader
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(e.g., LILO).</para></sect4>
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<sect4><title>telinit</title>
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<para>telinit sends appropriate signals to init, telling it which runlevel to
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change to.</para></sect4>
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<sect4><title>utmpdump</title>
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<para>utmpdumps prints the content of a file (usually /var/run/utmp) on
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standard output in a user friendly format.</para></sect4>
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<sect4><title>wall</title>
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<para>wall sends a message to everybody logged in with their mesg permission
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set to yes.</para></sect4>
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</sect3>
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</sect2>
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