Centos services

service command - list running services

service --status-all
service --status-all | grep ntpd
service --status-all | less

Print the status of any service

service httpd status

List all known services (configured via SysV)

chkconfig --list

List service and their open ports

netstat -tulpn

Turn on / off service

ntsysv
chkconfig service off
chkconfig service on
chkconfig httpd off
chkconfig ntpd on