https://gist.githubusercontent.com/edisonlee55/7fdd61ea9ed9aba68e2dd02f6ff4814a/raw/4b1721477575c4c255238ac6f7da9a18e1048735/pve_xtermjs_for_ubuntu_vm.txt

1. 图形页面硬件中加入串口
   

2. 启动服务

   sudo systemctl enable serial-getty@ttyS0.service
   sudo systemctl start serial-getty@ttyS0.service

3. 使用xterm.js连接串口