systemctl set-default graphical.target \\设置默认图形化运行级别
rm '/etc/systemd/system/default.target'
ln -s '/usr/lib/systemd/system/graphical.target' '/etc/systemd/system/default.target'
[root@localhost Desktop]# systemctl get-default \\查看默认运行级别
graphical.target \\图形化设置OK
[root@localhost Desktop]#