centos7 Linux图形界面安装 默认启动级别

rui

centos7不能像centos6那样直接修改/etc/inittab文件来达到目的；
/ W& i9 j: L9 W6 W4 _1 Wcentos仍然只有两种启动模式：

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multi-user.target: analogous to runlevel 3  #命令行模式

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graphical.target: analogous to runlevel 5   #图形模式

[img]file:///C:/Users/Victor/AppData/Roaming/Tencent/Users/1320503165/QQ/WinTemp/RichOle/TPFTNY07I$[JCF%7DNKUYDLNQ.png[/img]
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[img]file:///C:/Users/Victor/AppData/Roaming/Tencent/Users/1320503165/QQ/WinTemp/RichOle/TPFTNY07I$[JCF%7DNKUYDLNQ.png[/img]
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通过systemctl get-default 命令获取当前模式：

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由上面结果可知，当前为命令行模式

通过systemctl set-default graphical.target 命令，修改启动模式

前提是：你安装了图形界面

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admin

centos图形界面安装
yum groupinstall -y "X Window System"
; |, W9 e& [0 K& J$ vyum groupinstall -y "Desktop"

admin

yum -y groupinstall "Server with GUI"   安装gui图形组件

admin

[root@localhost Desktop]# systemctl get-default          \\查看默认运行级别 multi-user.target [root@localhost Desktop]
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# cat /etc/inittab # inittab is no longer used when using systemd. #
$ B7 V3 E' v. I- K0 g# b # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM. #
* G0 V8 H! x/ P; b. u# Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target #
3 M: I( L5 D7 Q+ J: U% ~# systemd uses 'targets' instead of runlevels. By default, there are two main targets: #
" [  ~$ @* I- v9 M, g7 J# multi-user.target: analogous to runlevel 3                \\运行级别3：多用户界面
# graphical.target: analogous to runlevel 5                  \\运行级别5：图形化界面 #
# To set a default target, run: #
+ S/ m2 F2 b. D, Q$ ], e # ln -sf /lib/systemd/system/.target   /etc/systemd/system/default.target

# k7 h- d. ^! P2 T" \# [root@localhost Desktop]
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# systemctl set-default graphical.target \\设置默认图形化运行级别
+ |7 R% n; b( d/ w8 a9 Wrm '/etc/systemd/system/default.target' 、
, r& i$ h8 v; g- m! Wln -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]#
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admin

[root@localhost Desktop]# systemctl get-default          \\查看默认运行级别 multi-user.target
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8 z5 \* F" V6 n. t/ d: | [root@localhost Desktop]# cat /etc/inittab
# inittab is no longer used when using systemd.
; j# r. R4 @8 }# G# # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
# # Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target
# # systemd uses 'targets' instead of runlevels. By default, there are two main targets:
3 h* I9 `0 u7 W8 z0 t# # multi-user.target: analogous to runlevel 3                \\运行级别3：多用户界面
* p- ?0 Y+ P4 u# ^# graphical.target: analogous to runlevel 5                  \\运行级别5：图形化界面
# # To set a default target, run: #
# ln -sf /lib/systemd/system/.target   /etc/systemd/system/default.target #
[root@localhost Desktop]# 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'
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[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]#
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admin

由上面结果可知，当前为命令行模式 通过systemctl set-default graphical.target 命令，修改启动模式

admin

由上面结果可知，当前为命令行模式 通过systemctl set-default multi-user.target 命令，修改启动模式为文本模式

admin

# systemctl get-default      获取当前系统默认启动方式：
multi-user.target
* z' K$ U4 X+ M  I#systemctl set-default multi-user.target  #命令，修改启动模式为文本模式

admin

yum -y groupinstall "GNOME Desktop"