chkconfig

Manage the runlevel of services on CentOS 6. More information: https://manned.org/chkconfig.

• List services with runlevel:
  chkconfig --list
• Show a service's runlevel:
  chkconfig --list {{ntpd}}
• Enable service at boot:
  chkconfig {{sshd}} on
• Enable service at boot for runlevels 2, 3, 4, and 5:
  chkconfig --level {{2345}} {{sshd}} on
• Disable service at boot:
  chkconfig {{ntpd}} off
• Disable service at boot for runlevel 3:
  chkconfig --level {{3}} {{ntpd}} off