以nginx服务为例
启动服务
systemctl start nginx关闭服务
systemctl stop nginx重启服务
systemctl restart nginx显示服务的状态
systemctl status nginx在开机时启用服务
systemctl enable nginx在开机时禁用服务
systemctl disable nginx查看服务是否开机启动
systemctl is-enabled nginx查看已启动的服务列表
systemctl list-unit-files|grep enabled查看启动失败的服务列表
systemctl --failed
