systemctl start service 启动服务
systemctl restart service 重新启动服务
systemctl stop service 关闭服务
systemctl reload service 重新加载配置文件
systemctl status service 查看服务状态
systemctl enable service 开机自启动服务
systemctl disable service 开机不自启动服务
systemctl is-enabled service 查看服务是否自启动
