The difference in service, chkconfig and systemctl

<source : http://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7>

□ chkconfig, service, systemctl : They are commands that manages services.

□ service

○ Function : Check/Start/Stop services

□ chkconfig

○ Before CentOS 7, it manages services.
○ Function : Check/Start/Stop services + Enable/Disable services + Register/Deregister services

□ systemctl

○ From CentOS 7('15~), it manages services.
○ Function : Check/Start/Stop services + Enable/Disable services