linux 图形界面和文字界面修改

原文：https://blog.csdn.net/kouryoushine/article/details/78301919

老方法：vim /etc/inittab
    # inittab is no longer used when using systemd.
    #
    # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
    #
    # Ctrl-Alt-Delete is handled by /usr/lib/systemd/system/ctrl-alt-del.target
    #
    # systemd uses 'targets' instead of runlevels. By default, there are two main targets:
    #
    # multi-user.target: analogous to runlevel 3
    # graphical.target: analogous to runlevel 5
    #
    # To view current default target, run:
    # systemctl get-default
    #
    # To set a default target, run:
    # systemctl set-default TARGET.target

以上说明，这个文档已经被废弃了，即使修改也不产生任何作用。

老式系统运行级别的说法已经被抛弃了，也就是不存在1-6个运行级别的说法了。
1.查看当前默认启动界面命令：
systemctl get-default

2.修改默认启动界面为图形界面
systemctl set-default   graphical.target

3.修改默认启动界面为命令界面
systemctl set-default  multi-user.target

重启
reboot