Systemctl Command in Centos7
service command replaced by systemctl command in Centos7
To Check the status of a service,
#systemctl status servicename.service
OR
#systemctl status servicename.service
To restart a service,
#systemctl restart servicename.service
OR
#systemctl restart servicename
To stop a service,
#systemctl start servicename.service
OR
#systemctl start servicename
To start a service,
#systemctl stop servicename.service
OR
#systemctl stop servicename
chkconfig command also replaced by systemctl command in Centos7
Enable a serice to run on start up,
#systemctl enable servicename
Disable a serice to run on start up,
#systemctl disable servicename