centos7 和centos6 服务操作命令对比

以httpd为例子：

指令名称	centos 6	centos 7
启动服务	service httpd start	systemctl start httpd.service
关闭服务	service httpd stop	systemctl stop httpd.service
重启服务	service httpd restart	systemctl restart httpd.service
查看服务状态	service httpd status	systemctl status httpd.service
设置服务开机启动	chkconfig httpd on	systemctl enable httpd.service
设置服务开机关闭	chkconfig httpd off	systemctl disable httpd.service
查看服务开机启动	chkconfig –list	systemctl list-units –type=service