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；
centos仍然只有两种启动模式：

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

admin

centos图形界面安装
" L  j; g0 I7 d+ E yum groupinstall -y "X Window System"
yum 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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% V# k4 i% g1 K2 j# cat /etc/inittab # inittab is no longer used when using systemd. #
! `1 R+ p& ]4 }8 O3 E # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM. #
# Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target #
/ A, s* J- T9 I, X! r' w, b# v# systemd uses 'targets' instead of runlevels. By default, there are two main targets: #
- u3 z+ f  }+ n9 l# multi-user.target: analogous to runlevel 3                \\运行级别3：多用户界面
& P2 Z: Y* M, o  Y  h5 F  k# graphical.target: analogous to runlevel 5                  \\运行级别5：图形化界面 #
6 @1 J2 n# I6 H3 B6 |4 F# To set a default target, run: #
# ln -sf /lib/systemd/system/.target   /etc/systemd/system/default.target
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# [root@localhost Desktop]
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( y5 D/ ^) e  ~# systemctl set-default graphical.target \\设置默认图形化运行级别
. Z3 |4 d# a8 p8 l7 ?9 w0 [rm '/etc/systemd/system/default.target' 、
: M6 h9 E( W) o! U& Lln -s '/usr/lib/systemd/system/graphical.target' '/etc/systemd/system/default.target'
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0 l' s; g$ d2 D1 _% L7 ~ [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]#

admin

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

, V! i. V. a; n4 C+ n* t [root@localhost Desktop]# cat /etc/inittab
# inittab is no longer used when using systemd.
# # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
9 b- f0 ?( L8 k* B  O0 d# # 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:
+ c& m3 J% n# z# # 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: #
# 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'
( m! p4 Y5 x9 [& nln -s '/usr/lib/systemd/system/graphical.target' '/etc/systemd/system/default.target'
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! a' j% p; l9 b* j: F& t1 U; u" E[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：
" ^+ t" f8 d" fmulti-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"