systemctl服务
查看已启动的服务 systemctl list-units --type=service
查看是否设置开机启动 systemctl list-unit-files | grep enable
启动服务 systemctl start <服务>.service
重启动服务 systemctl restart <服务>.service
停止服务 systemctl stop <服务>.service
设置开机启动 systemctl enable <服务>.service
关闭开机启动 systemctl disable <服务>.service