//to see all runninig services
sudo service --status-all | grep +
//to start service
sudo service [service name] start
//to stop service
sudo service [service name] stop
// to see specific service status
sudo service [service name] status
# For CentOS 7
systemctl
systemctl | more
systemctl | grep httpd
systemctl list-units --type service
systemctl list-units --type mount
$ pstree | head -n 5