@大法师 谢谢!搞定了
ubuntu 20没有/etc/rc.local,需要

新建service
sudo vim /etc/systemd/system/rc-local.service [Unit] Description=/etc/rc.local Compatibility ConditionPathExists=/etc/rc.local [Service] Type=forking ExecStart=/etc/rc.local start TimeoutSec=0 StandardOutput=tty RemainAfterExit=yes SysVStartPriority=99 [Install] WantedBy=multi-user.target

2.使能service
sudo systemctl enable rc-local.service
3.新建/etc/rc.local
sudo vim /etc/rc.local
并需要操作的命令加进去
4.启动服务
sudo systemctl start rc-local.service
sudo systemctl status rc-local.service