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；
7 [% A' ^2 h* {$ }5 Gcentos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$[JCF%7DNKUYDLNQ.png[/img]
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3 a  d! c9 @. A% m[img]file:///C:/Users/Victor/AppData/Roaming/Tencent/Users/1320503165/QQ/WinTemp/RichOle/TPFTNY07I$[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
7 a3 P+ Y1 }0 d- q* o8 n( ` yum groupinstall -y "X Window System"
4 O' e& \- o" P( ]1 l, uyum 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]

# cat /etc/inittab # inittab is no longer used when using systemd. #
) ^4 A3 H9 C$ Z; e! F( z8 [ # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM. #
3 O$ W3 R3 c: t7 K9 n+ O3 w# 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: #
2 [3 R- L$ g, _) a# 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 #
1 Q7 u4 _$ a3 p2 Y. ~# To set a default target, run: #
# ln -sf /lib/systemd/system/.target   /etc/systemd/system/default.target
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; n- |7 h; b1 n& @5 H4 m# [root@localhost Desktop]

# systemctl set-default graphical.target \\设置默认图形化运行级别
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# m% Y8 h/ f; D7 o% t. b6 mln -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

[root@localhost Desktop]# systemctl get-default          \\查看默认运行级别 multi-user.target

[root@localhost Desktop]# cat /etc/inittab
1 @8 V1 ?3 \. J3 ~# inittab is no longer used when using systemd.
7 x7 b: s1 q% a+ ]7 b1 ^5 `& b% G, z# # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
# # Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target
* D9 @) p6 ]+ z. V# # systemd uses 'targets' instead of runlevels. By default, there are two main targets:
# # multi-user.target: analogous to runlevel 3                \\运行级别3：多用户界面
# f+ z# p1 V- b4 ~& m# graphical.target: analogous to runlevel 5                  \\运行级别5：图形化界面
# # To set a default target, run: #
1 C2 g) W& A0 U! X% |$ v# ln -sf /lib/systemd/system/.target   /etc/systemd/system/default.target #
" d; ~7 c# D5 D8 P% ^4 [2 H" r' G [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'
, B1 B9 W" Q2 |( i' x4 tln -s '/usr/lib/systemd/system/graphical.target' '/etc/systemd/system/default.target'
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* `/ g: I. N3 p, R( E3 B[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：
$ e+ X5 q/ j0 }; S2 t6 T$ C5 \# Qmulti-user.target
#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"