RHEL7运行级别

切换到第三运行级

systemctl isolate multi-user.target 或 systemctl isolate runlevel3.target

切换到第五运行级别

systemctl isolate graphical.target 或 systemctl isolate runlevel5.target

设置默认第三启动级别

systemctl set-default multi-user.target

设置默认第五启动级别

systemctl set-default graphical.target

查看当前默认的启动级别

systemctl get-default