/etc/inittab文件
# cat /etc/inittab å
# @(#) init.base 25.6 95/03/22
#
# Copyright (C) 1988-1995 The Santa Cruz Operation， Inc.
# All Rights Reserved.
# The information in this file is provided for the exclusive use of
# the licensees of The Santa Cruz Operation， Inc. Such users have the
# right to use， modify， and incorporate this code into other products
# for purposes authorized by the license agreement provided they include
# this notice and the associated copyright notice with any such product.
# The information in this file is provided "AS IS" without warranty.
#
# /etc/inittab on 286/386 processors is built by Installable
# Drivers (ID) each time the kernel is rebuilt. /etc/inittab is replaced
# by /etc/conf/cf.d/init.base appended with the component files in the
# /etc/conf/init.d directory by the /etc/conf/bin/idmkinit command.
#
# To comment out an entry of /etc/inittab， insert a # at start of line.
#
bchk::sysinit:/etc/bcheckrc /dev/console 2>&1
ifor::sysinit:/etc/ifor_pmd /usr/adm/pmd.log 2>&1
tcb::sysinit:/etc/smmck /dev/console 2>&1
ck:234:bootwait:/etc/asktimerc /dev/console 2>&1
ack:234:wait:/etc/authckrc /dev/console 2>&1
is:S:initdefault:
r0:056:wait:/etc/rc0 1> /dev/console 2>&1
r1:1:wait:/etc/rc1 1> /dev/console 2>&1
r2:2:wait:/etc/rc2 1> /dev/console 2>&1
r3:3:wait:/etc/rc3 1> /dev/console 2>&1
sd:0:wait:/etc/uadmin 2 0 >/dev/console 2>&1
fw:5:wait:/etc/uadmin 2 2 >/dev/console 2>&1
rb:6:wait:/etc/uadmin 2 1 >/dev/console 2>&1
co:2345:respawn:/etc/getty tty01 sc_m
co1:1:respawn:/bin/sh -c "sleep 20; exec /etc/getty tty01 sc_m"
c02:234:off:/etc/getty tty02 sc_m
c03:234:respawn:/etc/getty tty03 sc_m
c04:234:respawn:/etc/getty tty04 sc_m
c05:234:respawn:/etc/getty tty05 sc_m
c06:234:respawn:/etc/getty tty06 sc_m
c07:234:respawn:/etc/getty tty07 sc_m
c08:234:respawn:/etc/getty tty08 sc_m
c09:234:respawn:/etc/getty tty09 sc_m
c10:234:respawn:/etc/getty tty10 sc_m
c11:234:respawn:/etc/getty tty11 sc_m
c12:234:respawn:/etc/getty tty12 sc_m
sdd:234:respawn:/tcb/files/no_luid/sdd
tcp::sysinit:/etc/tcp start < /dev/null > /dev/null 2>&1
Se1a:234:off:/etc/getty tty1a m
Se1A:234:off:/etc/getty -t60 tty1A 3
Se2a:234:off:/etc/getty tty2a m
Se2A:234:off:/etc/getty -t60 tty2A 3
http::sysinit:/etc/scohttp start
scl:b:once:/etc/rc2.d/P86scologin start no_switch
sclb:2:bootwait:/etc/scologin init
#_
/etc/inittab文件是一个普通的文本文件，每行信息是由用冒号分开的四个字段的登记项组成的。其格式为：
id：rstate：action：process （这里的三个冒号“：”不能省）。
id：最多由四个字符组成的特殊的惟一的确认标识符。
rstate：执行登记项的init级（run-level）。
action：指明init在进程中将要执行的动作的关键字，如boot， bootwait。
process：在进入特定的运行级后，init所执行的进程。
/etc/inittab文件中的内容实际上是进程和运行级别的对照表。当系统进入某一运行级别时，处于该级别的所有进程都将被激活。init进程在三种状态下读/etc/inittab文件，即在引导系统时，当init进程启动的进程结束时和当系统管理员带一个运行级参数时。
