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6.76.2. Contents of Sysvinit
Installed programs: bootlogd, fstab-decode, halt, init, killall5, poweroff (link to halt), reboot (link to halt), runlevel, shutdown, and telinit (link to init)
Short Descriptions
bootlogd Logs boot messages to a log file
fstab-decode Run a command with fstab-encoded arguments
halt Normally invokes shutdown with the -h option, except when already in run-level 0, then it tells the kernel to halt the system; it notes in the file /var/log/wtmp that the system is being brought down
init The first process to be started when the kernel has initialized the hardware which takes over the boot process and starts all the proceses specified in its configuration file
killall5 Sends a signal to all processes, except the processes in its own session so it will not kill its parent shell
poweroff Tells the kernel to halt the system and switch off the computer (see halt) reboot Tells the kernel to reboot the system (see halt)
runlevel Reports the previous and the current run-level, as noted in the last run-level record in /var/run/ utmp
shutdown Brings the system down in a secure way, signaling all processes and notifying all logged-in users
telinit Tells init which run-level to change to