service [服务] start systemctl start [unit type] 启动服务
#启动网络服务 systemctl start network.service
service [服务] stop systemctl stop [unit type] 停止服务
#停止网络服务 systemctl stop network.service
service [服务] restart systemctl restart [unit type] 重启服务
#重启网络服务 systemctl restart network.service
此外还是二个systemctl参数没有与service命令参数对应
status：参数来查看服务运行情况
reload：重新加载服务，加载更新后的配置文件（并不是所有服务都支持这个参数，比如network.service）
应用举例：
#查看网络服务状态
systemctl status network.serivce
nginx php mysql 常用命令
systemctl status nginx
systemctl start nginx
service nginx restart #重启 Nginx
service php-fpm restart # 重启 php-fpm
systemctl start mysqld #启动 MySQL
systemctl status mysqld #查看 MySQL 状态
systemctl stop mysqld #关闭mysql
systemctl enable mysqld #mysql开机启动
推荐文章：
https://blog.csdn.net/w892824196/article/details/86663602
https://blog.csdn.net/u012834750/article/details/80501440