ubuntu关闭gonome

手里一台ubuntu 的IPMI后台管理机，平时不跑啥业务，偶尔做做nfs，ftp中转机，不需要图形界面，后台发现资源紧张，干脆把gonome一块儿关了

root@santiagod:~# systemctl get-default
graphical.target
root@santiagod:~# systemctl set-default multi-user.target
Created symlink /etc/systemd/system/default.target → /lib/systemd/system/multi-user.target.
root@santiagod:~# systemctl stop gdm

root@santiagod:~# systemctl get-default
multi-user.target