# id:3:initdefault: # System initialization. si::sysinit:/etc/rc.d/rc.sysinit l0:0:wait:/etc/rc.d/rc 0 (Web design online)

# id:3:initdefault: # System initialization. si::sysinit:/etc/rc.d/rc.sysinit l0:0:wait:/etc/rc.d/rc 0 l1:1:wait:/etc/rc.d/rc 1 l2:2:wait:/etc/rc.d/rc 2 l3:3:wait:/etc/rc.d/rc 3 l4:4:wait:/etc/rc.d/rc 4 l5:5:wait:/etc/rc.d/rc 5 l6:6:wait:/etc/rc.d/rc 6 # Things to run in every runlevel. ud::once:/sbin/update # Trap CTRL-ALT-DELETE ca::ctrlaltdel:/sbin/shutdown -t3 -r now # When our UPS tells us power has failed, assume we have a few minutes # of power left. Schedule a shutdown for 2 minutes from now. # This does, of course, assume you have powerd installed and your # UPS connected and working correctly. pf::powerfail:/sbin/shutdown -f -h +2 “Power Failure; System Shutting Down” # If power was restored before the shutdown kicked in, cancel it. pr:12345:powerokwait:/sbin/shutdown -c “Power Restored; Shutdown Cancelled” # Run gettys in standard runlevels 1:2345:respawn:/sbin/mingetty tty1 2:2345:respawn:/sbin/mingetty tty2 3:2345:respawn:/sbin/mingetty tty3 4:2345:respawn:/sbin/mingetty tty4 5:2345:respawn:/sbin/mingetty tty5 6:2345:respawn:/sbin/mingetty tty6 # Run xdm in runlevel 5 # xdm is now a separate service x:5:respawn:/etc/X11/prefdm -nodaemon Format of the inittab file The plain-text inittab file consists of several colon-separated fields in the format: id:runlevels:action:command The id field is a unique identifier, one to four alphanumeric characters in length that represents a particular action to take during system start-up. The run levels field contains a list of run levels in which the command will be run. Common run levels are 0, 1, 2, 3, 4, 5, and 6 (s and S represent single-user mode, which is equivalent to 1). Run levels 7, 8, and 9 are not standard; they can also be used as the special run levels associated with the on demand action (a, b, and c, which are equivalent to A, B, and C). The next field represents the type of action to be taken by init (valid actions and the results of those actions are listed in Table 12-4), and the last field is the actual command that is to be executed. Table 12-4: Valid init Actions Action How the Command Is Run once The command is executed once when entering the specified run level.
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