在 RedHat / CentOS Linux 中可以使用 chkconfig / systemctl 來查看開機時服務啟動的設定狀態
CentOS 6.x
# /sbin/chkconfig –list
crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
fail2ban 0:off 1:off 2:off 3:off 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:on 4:off 5:off 6:off
ipset 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
mysqld 0:off 1:off 2:off 3:on 4:off 5:off 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
ntpdate 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
rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
snmpd 0:off 1:off 2:off 3:on 4:off 5:off 6:off
snmptrapd 0:off 1:off 2:off 3:off 4:off 5:off 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
udev-post 0:off 1:on 2:off 3:off 4:off 5:off 6:off[@more@]
# /sbin/chkconfig –list snmpd
snmpd 0:off 1:off 2:off 3:on 4:off 5:off 6:off
# /sbin/chkconfig –list | grep 3:on
crond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
httpd 0:off 1:off 2:off 3:on 4:off 5:off 6:off
ipset 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
mysqld 0:off 1:off 2:off 3:on 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
rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
snmpd 0:off 1:off 2:off 3:on 4:off 5:off 6:off
sshd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
CentOS 7.x
# /usr/bin/systemctl list-unit-files | grep enabled
autovt@.service enabled
barnyard2.service enabled
crond.service enabled
getty@.service enabled
httpd.service enabled
iptables.service enabled
mariadb.service enabled
rsyslog.service enabled
snmpd.service enabled
sshd.service enabled
systemd-readahead-collect.service enabled
systemd-readahead-drop.service enabled
systemd-readahead-replay.service enabled
default.target enabled
graphical.target enabled
remote-fs.target enabled
runlevel5.target enabled
在 Debian / Ubuntu
# apt-get install sysv-rc-conf
# /usr/sbin/sysv-rc-conf –list
atd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
bootlogs 1:on 2:on 3:on 4:on 5:on
cron 2:on 3:on 4:on 5:on
dbus 2:on 3:on 4:on 5:on
halt 0:off
killprocs 1:on
kmod S:on
motd 1:on 2:on 3:on 4:on 5:on
networking 0:off 6:off S:on
postfix 0:off 1:off 2:on 3:on 4:on 5:on 6:off
procps S:on
rc.local 2:on 3:on 4:on 5:on
reboot 6:off
rmnologin 2:on 3:on 4:on 5:on
rpcbind 0:off 1:off 6:off S:on
rsync 2:on 3:on 4:on 5:on
rsyslog 0:off 1:off 2:on 3:on 4:on 5:on 6:off
sendsigs 0:off 6:off
single 1:on
snmpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
ssh 2:on 3:on 4:on 5:on
umountfs 0:off 6:off
umountroot 0:off 6:off
urandom 0:off 6:off S:on
x11-common S:on
# /usr/sbin/sysv-rc-conf –list snmpd
snmpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off
# /usr/sbin/update-rc.d snmpd remove
# /usr/sbin/sysv-rc-conf –list snmpd
snmpd
# /usr/sbin/update-rc.d snmpd defaults
# /usr/sbin/sysv-rc-conf –list snmpd
snmpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off