https://www.idcbuy.net/it/linux/2433.html
Ref: https://blog.csdn.net/weixin_44730681/article/details/114322989
systemctl is-enabled servicename.service #查询服务是否开机启动
systemctl enable *.service #开机运行服务
systemctl disable *.service #取消开机运行
systemctl start *.service #启动服务
systemctl stop *.service #停止服务
systemctl restart *.service #重启服务
systemctl reload *.service #重新加载服务配置文件
systemctl status *.service #查询服务运行状态
https://sfyh.hnbdata.cn/linuxbook/ubuntu/Ubuntu%E8%AE%BE%E7%BD%AE%E4%BB%A3%E7%90%86.html
ubuntu 配置 clash https://www.cnblogs.com/yuan-zhou/p/16414064.html writing markdown makrdown 打空行1 #+空格 确实无效 ;
2 双空格 无效 ;
3 无效 ;
4
有效 ;
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