linux-/etc/inittab,rc.sysinit,rc服务类脚本,chkconfig
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o yaouyazhuLinux系统启动流程
POST-->Bios(Boot Sequence)-->MBR(bootloader,446)-->Kernel-->initrd-->(ROOTFS)/sbin/init(/etc/inittab)
Kernel初始化的过程：
1、设备探测
2、驱动初始化（可能会从initrd（initramfs）文件中装载驱动模块）
3、以只读挂载根文件系统；
4、装载第一个进程init（PID：1） （rw重新挂载rootfs）
initrd初始化的过程
/sbin/init：（/etc/inittab）
upstart: ubuntu, d-bus, event-driven （比传统init速度快）
systemd: （并行启动多个进程）
/sbin/init(/etc/inittab) 的初始化过程
rh6采用upstart，inittab无需过多配置
[[email protected] ~]# cat /etc/inittab
# inittab is only used by upstart for the default runlevel.
#
# ADDING OTHER CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
#
# System initialization is started by /etc/init/rcS.conf
#
# Individual runlevels are started by /etc/init/rc.conf
#
# Ctrl-Alt-Delete is handled by /etc/init/control-alt-delete.conf
#
# Terminal gettys are handled by /etc/init/tty.conf and /etc/init/serial.conf,
# with configuration in /etc/sysconfig/init.
#
# For information on how to write upstart event handlers, or how
# upstart works, see init(5), init(8), and initctl(8).
#
# Default runlevel. The runlevels used 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:5:initdefault:
[[email protected] ~]#
[[email protected] ~]# uname -a
Linux localhost 2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
[[email protected] ~]# ls /etc/init （inittab切割为多个*.conf文件；事件驱动）
control-alt-delete.conf plymouth-shutdown.conf rc.conf rcS-sulogin.conf readahead-disable-services.conf start-ttys.conf
init-system-dbus.conf prefdm.conf rcS.conf readahead-collector.conf serial.conf tty.conf
kexec-disable.conf quit-plymouth.conf rcS-emergency.conf readahead.conf splash-manager.conf
[[email protected] ~]#
[[email protected] ~]# cat /etc/init/rcS.conf （事件驱动）
# rcS - runlevel compatibility
#
# This task runs the old sysv-rc startup scripts.
#
# Do not edit this file directly. If you want to change the behaviour,
# please create a file rcS.override and put your changes there.
start on startup
stop on runlevel
task
# Note: there can be no previous runlevel here, if we have one it‘s bad
# information (we enter rc1 not rcS for maintenance). Run /etc/rc.d/rc
# without information so that it defaults to previous=N runlevel=S.
console output
pre-start script
for t in $(cat /proc/cmdline); do
case $t in
emergency)
start rcS-emergency
break
;;
esac
done
end script
exec /etc/rc.d/rc.sysinit
post-stop script
if [ "$UPSTART_EVENTS" = "startup" ]; then
[ -f /etc/inittab ] && runlevel=$(/bin/awk -F ‘:‘ ‘$3 == "initdefault" && $1 !~ "^#" { print $2 }‘ /etc/inittab)
[ -z "$runlevel" ] && runlevel="3"
for t in $(cat /proc/cmdline); do
case $t in
-s|single|S|s) runlevel="S" ;;
[1-9]) runlevel="$t" ;;
esac
done
exec telinit $runlevel
fi
end script
[[email protected] ~]#
主要分析rh5的inittab作用
（每一行代表运行一个进程）
id:3:initdefault:
id:runlevels:action:process
id: 标识符
runlevels: 在哪个级别运行此行；
action: 在什么情况下执行此行；
process: 要运行程序;
si::sysinit:/etc/rc.d/rc.sysinit
ACTION:
initdefault: 设定默认运行级别
sysinit: 系统初始化
wait: 等待级别切换至此级别时执行
respawn: 一旦程序终止，会重新启动
总结inittab脚本任务
/etc/inittab的任务：
1、设定默认运行级别；
2、运行系统初始化脚本；
3、运行指定运行级别对应的目录下的脚本；
4、设定Ctrl+Alt+Del组合键的操作；
5、定义UPS电源在电源故障/恢复时执行的操作；
6、启动虚拟终端(2345级别)；
7、启动图形终端(5级别)；
学习脚本：/etc/rc.d/rc.sysinit完成的任务（系统初始化）：
[[email protected] ~]# wc -l /etc/rc.d/rc.sysinit
681 /etc/rc.d/rc.sysinit
[[email protected] ~]# file /etc/rc.d/rc.sysinit
/etc/rc.d/rc.sysinit: Bourne-Again shell script text executable
1、激活udev和selinux； （前200行左右）
2、根据/etc/sysctl.conf文件，来设定内核参数；
3、设定时钟时钟；
4、装载键盘映射；
5、启用交换分区；
6、设置主机名；
7、根文件系统检测，并以读写方式重新挂载；
8、激活RAID和LVM设备；
9、启用磁盘配额；
10、根据/etc/fstab，检查并挂载其它文件系统；
11、清理过期的锁和PID文件；
for I in /etc/rc3.d/K*; do
$I stop
done
for I in /etc/rc3.d/S*; do
$I start
done
##: 关闭或启动的优先次序，数据越小越优先被选定
先关闭以K开头的服务，后启动以S开头的服务；
[[email protected] ~]# cat /etc/rc.d/rc
#! /bin/bash
#
# rc This file is responsible for starting/stopping
# services when the runlevel changes.
#
# Original Author:
# Miquel van Smoorenburg, <[email protected]>
#
set -m
# check a file to be a correct runlevel script
check_runlevel ()
{
# Check if the file exists at all.
[ -x "$1" ] || return 1
is_ignored_file "$1" && return 1
return 0
}
# Now find out what the current and what the previous runlevel are.
argv1="$1"
set $(/sbin/runlevel)
runlevel=$2
previous=$1
export runlevel previous
. /etc/init.d/functions
export CONSOLETYPE
do_confirm="no"
if [ -f /var/run/confirm ]; then
do_confirm="yes"
fi
UPSTART=
[ -x /sbin/initctl ] && UPSTART=yes
# See if we want to be in user confirmation mode
if [ "$previous" = "N" ]; then
if [ "$do_confirm" = "yes" ]; then
echo $"Entering interactive startup"
else
echo $"Entering non-interactive startup"
fi
fi
# Get first argument. Set new runlevel to this argument.
[ -n "$argv1" ] && runlevel="$argv1"
# Is there an rc directory for this new runlevel?
[ -d /etc/rc$runlevel.d ] || exit 0
# Set language, vc settings once to avoid doing it for every init script
# through functions
if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" ] ; then
. /etc/profile.d/lang.sh 2>/dev/null
export LANGSH_SOURCED=1
fi
# First, run the KILL scripts.
for i in /etc/rc$runlevel.d/K* ; do
# Check if the subsystem is already up.
subsys=${i#/etc/rc$runlevel.d/K??}
[ -f /var/lock/subsys/$subsys -o -f /var/lock/subsys/$subsys.init ] || continue
check_runlevel "$i" || continue
# Bring the subsystem down.
[ -n "$UPSTART" ] && initctl emit --quiet stopping JOB=$subsys
$i stop
[ -n "$UPSTART" ] && initctl emit --quiet stopped JOB=$subsys
done
# Now run the START scripts.
for i in /etc/rc$runlevel.d/S* ; do
# Check if the subsystem is already up.
subsys=${i#/etc/rc$runlevel.d/S??}
[ -f /var/lock/subsys/$subsys ] && continue
[ -f /var/lock/subsys/$subsys.init ] && continue
check_runlevel "$i" || continue
# If we‘re in confirmation mode, get user confirmation
if [ "$do_confirm" = "yes" ]; then
confirm $subsys
rc=$?
if [ "$rc" = "1" ]; then
continue
elif [ "$rc" = "2" ]; then
do_confirm="no"
fi
fi
update_boot_stage "$subsys"
# Bring the subsystem up.
[ -n "$UPSTART" ] && initctl emit --quiet starting JOB=$subsys
if [ "$subsys" = "halt" -o "$subsys" = "reboot" ]; then
export LC_ALL=C
exec $i start
fi
$i start
[ -n "$UPSTART" ] && initctl emit --quiet started JOB=$subsys
done
[ "$do_confirm" = "yes" ] && rm -f /var/run/confirm
exit 0
[[email protected] ~]#
启动的服务不同：
运行级别：0-6
0：halt
1: single user mode, 直接以管理员身份切入， s,S,single
2：multi user mode, no NFS
3: multi user mode, text mode
4：reserved
5: multi user mode, graphic mode
6: reboot
[[email protected] ~]# ls /etc/rc.d/rc0.d/ （运行级别0）
K01smartd K10psacct K25sshd K50snmptrapd K74ntpd K80kdump K87irqbalance K90network K99rngd
K02rhsmcertd K10saslauthd K30postfix K50xinetd K75blk-availability K83bluetooth K87restorecond K92ip6tables K99sysstat
K03rhnsd K15htcacheclean K30spice-vdagentd K60crond K75netfs K84NetworkManager K88auditd K92iptables S00killall
K05atd K15httpd K50dnsmasq K73winbind K75ntpdate K84wpa_supplicant K88rsyslog K95firstboot S01halt
K05wdaemon K16abrt-ccpp K50netconsole K74acpid K75quota_nld K85mdmonitor K89portreserve K99cpuspeed
K10cups K16abrtd K50snmpd K74haldaemon K75udev-post K85messagebus K89rdisc K99lvm2-monitor
[[email protected] ~]# ls /etc/rc.d/rc6.d/ （运行级别6）
K01smartd K10psacct K25sshd K50snmptrapd K74ntpd K80kdump K87irqbalance K90network K99rngd
K02rhsmcertd K10saslauthd K30postfix K50xinetd K75blk-availability K83bluetooth K87restorecond K92ip6tables K99sysstat
K03rhnsd K15htcacheclean K30spice-vdagentd K60crond K75netfs K84NetworkManager K88auditd K92iptables S00killall
K05atd K15httpd K50dnsmasq K73winbind K75ntpdate K84wpa_supplicant K88rsyslog K95firstboot S01reboot
K05wdaemon K16abrt-ccpp K50netconsole K74acpid K75quota_nld K85mdmonitor K89portreserve K99cpuspeed
K10cups K16abrtd K50snmpd K74haldaemon K75udev-post K85messagebus K89rdisc K99lvm2-monitor
[[email protected] ~]# ls /etc/rc.d/rc5.d/ （运行级别5）
K01smartd K50netconsole K84wpa_supplicant S08iptables S15mdmonitor S26acpid S80postfix S99firstboot
K05wdaemon K50snmpd K87restorecond S10network S20kdump S26haldaemon S82abrt-ccpp S99local
K10psacct K50snmptrapd K89rdisc S11auditd S22messagebus S26udev-post S82abrtd
K10saslauthd K73winbind K99rngd S11portreserve S23NetworkManager S50bluetooth S90crond
K15htcacheclean K74ntpd S01sysstat S12rsyslog S25blk-availability S55sshd S95atd
K15httpd K75ntpdate S02lvm2-monitor S13cpuspeed S25cups S56xinetd S97rhnsd
K50dnsmasq K75quota_nld S08ip6tables S13irqbalance S25netfs S70spice-vdagentd S97rhsmcertd
[[email protected] ~]#
rc.d服务类脚本：
start
SysV： /etc/rc.d/init.d
start|stop|restart|status
reload|configtest
服务类脚本遵循的规则如下（自动创建链接）：
# chkconfig: runlevels SS KK 当chkconfig命令来为此脚本在rc#.d目录创建链接时，runlevels表示默认创建为S*开头的链接，-表示没有级别默认为S*开头的链接；除此之外的级别默认创建为K*开头的链接；
S后面的启动优先级为SS所表示的数字；K后面关闭优先次序为KK所表示的数字；
# description: 用于说明此脚本的简单功能； \, 续行
[[email protected] ~]# ls /etc/rc.d/init.d/ （服务类脚本目录）
abrt-ccpp blk-availability firstboot ip6tables lvm2-monitor NetworkManager quota_nld rsyslog snmptrapd winbind
abrtd bluetooth functions iptables mdmonitor ntpd rdisc sandbox spice-vdagentd wpa_supplicant
abrt-oops cpuspeed haldaemon irqbalance messagebus ntpdate restorecond saslauthd sshd xinetd
acpid crond halt kdump netconsole portreserve rhnsd single sysstat
atd cups htcacheclean killall netfs postfix rhsmcertd smartd udev-post
auditd dnsmasq httpd lvm2-lvmetad network psacct rngd snmpd wdaemon
[[email protected] ~]# cd /etc/rc.d/init.d/
[[email protected] init.d]# head acpid atd
==> acpid <==
#!/bin/bash
#
# /etc/rc.d/init.d/acpid
#
# Starts the acpi daemon
#
# chkconfig: 345 26 74
# description: Listen and dispatch ACPI events from the kernel
# processname: acpid
==> atd <==
#!/bin/sh
#
# atd Starts/stop the "at" daemon
#
# chkconfig: 345 95 5
# description: Runs commands scheduled by the "at" command at the time \
# specified when "at" was run, and runs batch commands when the load \
# average is low enough.
### BEGIN INIT INFO
[[email protected] init.d]#
chkconfig 编译服务类脚本为不同级别下的独立守护服务
# chkconfig: runlevels SS KK
当chkconfig命令来为此脚本在rc#.d目录创建链接时，runlevels表示默认创建为S*开头的链接，-表示没有级别默认为S*开头的链接；除此之外的级别默认创建为K*开头的链接；
S后面的启动优先级为SS所表示的数字；K后面关闭优先次序为KK所表示的数字；
# description: 用于说明此脚本的简单功能； \, 续行
chkconfig --list： 查看所有独立守护服务的启动设定；独立守护进程！
chkconfig --list SERVICE_NAME
chkconfig --add SERVICE_NAME
chkconfig --del SERVICE_NAME
chkconfig [--level RUNLEVELS] SERVICE_NAME {on|off}
如果省略级别指定，默认为2345级别；
自定义服务类脚本myservice
[[email protected] init.d]# bash myservice.sh start
starting...
[[email protected] init.d]# bash myservice.sh status
running...
[[email protected] init.d]# bash myservice.sh stop
stoping...
[[email protected] init.d]# bash myservice.sh status
stopped
[[email protected] init.d]# cat myservice.sh
#!/bin/bash
# chkconfig: 2345 88 11
# description: my test service
lockfile=/var/lock/subsys/myservice
case $1 in
start)
echo "starting..."
touch $lockfile ;;
stop)
echo "stoping..."
rm -f $lockfile &> /dev/null ;;
restart)
echo "restarting...";;
status)
if [ -e $lockfile ];then
echo "running..."
else
echo "stopped"
fi
;;
*)
echo "`basename $0` {start|stop|restart|status}";;
esac
[[email protected] init.d]#
[[email protected] init.d]# chkconfig --list
NetworkManager 0:off 1:off 2:on 3:on 4:on 5:on 6:off
abrt-ccpp 0:off 1:off 2:off 3:on 4:off 5:on 6:off
abrtd 0:off 1:off 2:off 3:on 4:off 5:on 6:off
acpid 0:off 1:off 2:on 3:on 4:on 5:on 6:off
atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
auditd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
blk-availability 0:off 1:on 2:on 3:on 4:on 5:on 6:off
bluetooth 0:off 1:off 2:off 3:on 4:on 5:on 6:off
cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off
crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
cups 0:off 1:off 2:on 3:on 4:on 5:on 6:off
dnsmasq 0:off 1:off 2:off 3:off 4:off 5:off 6:off
firstboot 0:off 1:off 2:off 3:on 4:off 5:on 6:off
haldaemon 0:off 1:off 2:off 3:on 4:on 5:on 6:off
htcacheclean 0:off 1:off 2:off 3:off 4:off 5:off 6:off
httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ip6tables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
irqbalance 0:off 1:off 2:off 3:on 4:on 5:on 6:off
kdump 0:off 1:off 2:off 3:on 4:on 5:on 6:off
lvm2-monitor 0:off 1:on 2:on 3:on 4:on 5:on 6:off
mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off
messagebus 0:off 1:off 2:on 3:on 4:on 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
ntpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ntpdate 0:off 1:off 2:off 3:off 4:off 5:off 6:off
portreserve 0:off 1:off 2:on 3:on 4:on 5:on 6:off
postfix 0:off 1:off 2:on 3:on 4:on 5:on 6:off
psacct 0:off 1:off 2:off 3:off 4:off 5:off 6:off
quota_nld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off
restorecond 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rhnsd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
rhsmcertd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
rngd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
smartd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
spice-vdagentd 0:off 1:off 2:off 3:off 4:off 5:on 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
sysstat 0:off 1:on 2:on 3:on 4:on 5:on 6:off
udev-post 0:off 1:on 2:on 3:on 4:on 5:on 6:off
wdaemon 0:off 1:off 2:off 3:off 4:off 5:off 6:off
winbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off
wpa_supplicant 0:off 1:off 2:off 3:off 4:off 5:off 6:off
xinetd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
xinetd based services:
chargen-dgram: off
chargen-stream: off
daytime-dgram: off
daytime-stream: off
discard-dgram: off
discard-stream: off
echo-dgram: off
echo-stream: off
rsync: off
tcpmux-server: off
telnet: on
time-dgram: off
time-stream: off
[[email protected] init.d]#
[[email protected] init.d]# chkconfig --add myservice
[[email protected] init.d]# find ./ -name myservice
./myservice
[[email protected] rc.d]# find ./ -name "*myservice"
./init.d/myservice
./rc0.d/K11myservice
./rc6.d/K11myservice
./rc2.d/S88myservice
./rc1.d/K11myservice
./rc3.d/S88myservice
./rc5.d/S88myservice
./rc4.d/S88myservice
[[email protected] rc.d]# chkconfig --del myservice
[[email protected] rc.d]# find ./ -name "*myservice"
./init.d/myservice
[[email protected] rc.d]# chkconfig --add myservice
[[email protected] rc.d]# find ./ -name "*myservice"
./init.d/myservice
./rc0.d/K11myservice
./rc6.d/K11myservice
./rc2.d/S88myservice
./rc1.d/K11myservice
./rc3.d/S88myservice
./rc5.d/S88myservice
./rc4.d/S88myservice
[[email protected] rc.d]# chkconfig --list myservice
myservice 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[[email protected] rc.d]# chkconfig --level 24 myservice off
[[email protected] rc.d]# chkconfig --list myservice
myservice 0:off 1:off 2:off 3:on 4:off 5:on 6:off
[[email protected] rc.d]#
/etc/rc.d/rc.local：系统最后启动的一个服务，准确说，应该执行的一个脚本；
[[email protected] rc.d]# cat /etc/rc.d/rc.local
#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don‘t
# want to do the full Sys V style init stuff.
touch /var/lock/subsys/local
[[email protected] rc.d]#
守护进程的类型：
独立守护进程
xinetd：超级守护进程，代理人
瞬时守护进程：不需要关联至运行级别
[[email protected] rc.d]# chkconfig --list xinetd
xinetd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
[[email protected] rc.d]#
[email protected] rc.d]# chkconfig --list xinetd
xinetd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
[[email protected] rc.d]# chkconfig --list
NetworkManager 0:off 1:off 2:on 3:on 4:on 5:on 6:off
abrt-ccpp 0:off 1:off 2:off 3:on 4:off 5:on 6:off
abrtd 0:off 1:off 2:off 3:on 4:off 5:on 6:off
acpid 0:off 1:off 2:on 3:on 4:on 5:on 6:off
atd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
auditd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
blk-availability 0:off 1:on 2:on 3:on 4:on 5:on 6:off
bluetooth 0:off 1:off 2:off 3:on 4:on 5:on 6:off
cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off
crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
cups 0:off 1:off 2:on 3:on 4:on 5:on 6:off
dnsmasq 0:off 1:off 2:off 3:off 4:off 5:off 6:off
firstboot 0:off 1:off 2:off 3:on 4:off 5:on 6:off
haldaemon 0:off 1:off 2:off 3:on 4:on 5:on 6:off
htcacheclean 0:off 1:off 2:off 3:off 4:off 5:off 6:off
httpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ip6tables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
iptables 0:off 1:off 2:on 3:on 4:on 5:on 6:off
irqbalance 0:off 1:off 2:off 3:on 4:on 5:on 6:off
kdump 0:off 1:off 2:off 3:on 4:on 5:on 6:off
lvm2-monitor 0:off 1:on 2:on 3:on 4:on 5:on 6:off
mdmonitor 0:off 1:off 2:on 3:on 4:on 5:on 6:off
messagebus 0:off 1:off 2:on 3:on 4:on 5:on 6:off
myservice 0:off 1:off 2:off 3:on 4:off 5:on 6:off
netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off
netfs 0:off 1:off 2:off 3:on 4:on 5:on 6:off
network 0:off 1:off 2:on 3:on 4:on 5:on 6:off
ntpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
ntpdate 0:off 1:off 2:off 3:off 4:off 5:off 6:off
portreserve 0:off 1:off 2:on 3:on 4:on 5:on 6:off
postfix 0:off 1:off 2:on 3:on 4:on 5:on 6:off
psacct 0:off 1:off 2:off 3:off 4:off 5:off 6:off
quota_nld 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rdisc 0:off 1:off 2:off 3:off 4:off 5:off 6:off
restorecond 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rhnsd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
rhsmcertd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
rngd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
saslauthd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
smartd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmpd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
spice-vdagentd 0:off 1:off 2:off 3:off 4:off 5:on 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
sysstat 0:off 1:on 2:on 3:on 4:on 5:on 6:off
udev-post 0:off 1:on 2:on 3:on 4:on 5:on 6:off
wdaemon 0:off 1:off 2:off 3:off 4:off 5:off 6:off
winbind 0:off 1:off 2:off 3:off 4:off 5:off 6:off
wpa_supplicant 0:off 1:off 2:off 3:off 4:off 5:off 6:off
xinetd 0:off 1:off 2:off 3:on 4:on 5:on 6:off
xinetd based services: （瞬时守护进程）
chargen-dgram: off
chargen-stream: off
daytime-dgram: off
daytime-stream: off
discard-dgram: off
discard-stream: off
echo-dgram: off
echo-stream: off
rsync: off
tcpmux-server: off
telnet: on
time-dgram: off
time-stream: off
[[email protected] rc.d]# chkconfig rsync on
[[email protected] rc.d]# chkconfig --list
xinetd based services:
chargen-dgram: off
chargen-stream: off
daytime-dgram: off
daytime-stream: off
discard-dgram: off
discard-stream: off
echo-dgram: off
echo-stream: off
rsync: on
tcpmux-server: off
telnet: on
time-dgram: off
time-stream: off
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