1. 安装图形界面和 xrdp

sudo apt install ubuntu-desktop
sudo apt install xrdp
# 开启xrdp端口
sudo ufw allow 3389/tcp
sudo ufw reload

2. 将默认启动方式修改为命令行

sudo systemctl set-default multi-user.target
sudo systemctl disable gdm
sudo systemctl disable xrdp
# 查看默认启动方式
systemctl get-default
# graphical.target是图形界面，multi-user.target是多用户命令行界面

3. 启动图形界面和 xrdp

sudo systemctl start gdm # 返回命令行界面需要stop一下
sudo systemctl start xrdp