更新环境
sudo apt update
sudo apt upgrade
安装桌面
sudo apt install tasksel
sudo tasksel install ubuntu-desktop
关闭桌面
sudo systemctl set-default multi-user.target
sudo reboot
开启桌面
sudo systemctl set-default graphical.target
sudo reboot
卸载桌面
sudo apt-get remove gnome-shell
sudo apt-get remove gnome
sudo apt-get autoremove
sudo apt-get purge gnome
sudo apt-get autoclean
sudo apt-get clean