Use chkconfig in Linux to set Automatic Service Startup

Command description of chkconfig:

[Root @ mail ~] # Chkconfig
Chkconfig version 1.3.30.1-copyright (c) 1997-2000 red hat, Inc.
Under the terms of the GNU Public License, this software can be freely released.

Usage: chkconfig -- list [name]
Chkconfig -- add <Name>
Chkconfig -- del <Name>
Chkconfig [-- level <levels>] <Name> <on | off | reset | resetpriorities>
[Root @ mail ~] # Chkconfig -- list
NetworkManager 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close
Acpid 0: off 1: off 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
Anacron 0: off 1: off 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
Apmd 0: Disable 1: Disable 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
ATD 0: Disable 1: Disable 2: Disable 3: Enable 4: Enable 5: Enable 6: Disable
Auditd 0: off 1: off 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
Autofs 0: Disable 1: Disable 2: Disable 3: Enable 4: Enable 5: Enable 6: Disable
Avahi-daemon 0: Disable 1: Disable 2: Disable 3: Enable 4: Enable 5: Enable 6: Disable
Avahi-dnsconfd 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close
Bluetooth 0: Disable 1: Disable 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable
Capi 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close
Conman 0: Close 1: Close 2: Close 3: Close 4: Close 5: Close 6: Close
Cpuspeed 0: off 1: Enable 2: Enable 3: Enable 4: Enable 5: Enable 6: Disable

For example, set named startup

[Root @ mail ~] # Chkconfig named on

Check whether execution is successful:

[Root @ mail ~] # Chkconfig -- list named

Named 0: Disabled 1: Disabled2: Enable 3: Enable 4: Enable 5: Enable6: Disable