‌Ubuntu中使用systemctl管理的服务

systemctl命令的基本使用方法包括‌：

‌启动服务‌：sudo systemctl start servicename
‌停止服务‌：sudo systemctl stop servicename
‌重启服务‌：sudo systemctl restart servicename
‌查看服务状态‌：sudo systemctl status servicename
‌启用开机自启‌：sudo systemctl enable servicename
‌禁用开机自启‌：sudo systemctl disable servicename
‌查看所有已启动的服务‌：systemctl list-units --type=service
‌查看所有已启用的服务‌：systemctl list-unit-files --type=service