查看以前版本的inittab文件,看到提示
multi-user.target類似runlevel 3
graphical.target類似runlevel 5
查看當前運行級別
[root@pc01 ~]# systemctl get-default
graphical.target
[root@pc01 ~]# runlevel
N 5
改變當前運行級別
[root@pc01 ~]# systemctl set-default multi-user.target
Removed symlink /etc/systemd/system/default.target.
Created symlink from /etc/systemd/system/default.target to /usr/lib/systemd/system/multi-user.target.
會在/etc/systemd/system/下創建一個鏈接,鏈接到/usr/lib/systemd/system/下