/etc/inittab
1) 字符界面标识：
id:3:initdefault:
2) 图形界面标识：
id:5:initdefault:
[root@ora9i ~]# vi /etc/inittab
#
# inittab This file describes how
the INIT process should set up
#
the system in a certain run-level.
#
#
Author: Miquel van Smoorenburg,
<miquels@drinkel.nl.mugnet.org>
#
Modified for RHS Linux by Marc Ewing and Donnie Barnes
#
# Default runlevel. The runlevels used by RHS are:
# 0 -
halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, if you do not
have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 - X11
# 6
- reboot (Do NOT set initdefault to this)
#
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
# 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
x:5:respawn:/etc/X11/prefdm -nodaemon
原文地址：http://www.cnblogs.com/quanweiru/p/3763970.html
