linux 运行级别

相关目录

CentOS8 相关目录由/etc/inittab变成 /etc/systemd/system/default.target

[ranan@hadoop102 ~]$ cat /etc/systemd/system/default.target
#  SPDX-License-Identifier: LGPL-2.1+
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Graphical Interface
Documentation=man:systemd.special(7)
Requires=multi-user.target
Wants=display-manager.service
Conflicts=rescue.service rescue.target
After=multi-user.target rescue.service rescue.target display-manager.service
AllowIsolate=yes

查看、设置默认运行级别

0 poweroff.target ：关机，系统默认运行级别不能设为0，否则不能正常启动
1 rescue.target : 单用户 找回丢失密码有用，root权限，用于系统维护，禁止远程登录
2：多用户无网络
3 multi-user.target：多用户有网络服务，登陆后进入控制台命令行模式
4：保留
5 graphical.target：图形化界面
6 reboot.target：系统正常关闭重启，默认运行级别不能设为6，否则不能正常启动

查看默认运行级别

方式1：systemctl get-default

[ranan@hadoop102 ~]$ systemctl get-default
graphical.target

方式2：runlevel

[ranan@hadoop102 ~]$ runlevel
N 5

设置默认运行级别命令

设置默认命令行启动
[ranan@hadoop102 ~]# systemctl set-default  multi-user.target
设置图形界面启动
[ranan@hadoop102 ~]# systemctl set-default  graphical.target

切换当前运行级别

方法1：systemctl

//从命令行模式切换到图型模式
[ranan@hadoop102 ~]# systemctl isolate graphical.target  

//切换到多用户的命令行模式
[ranan@hadoop102 ~]# systemctl isolate multi-user.target

方法2：init

init 0|1|3|5|6

标签：target,default,ranan,systemctl,linux,hadoop102,级别,运行
来源： https://www.cnblogs.com/rananie/p/14971450.html