# 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 $Follow @igor_chubin cheat.sh tldr