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；
/ S# {! {2 ]2 G" t3 ccentos仍然只有两种启动模式：
# G1 S" M* q% M: ]* Z. W' L

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

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

[img]file:///C:/Users/Victor/AppData/Roaming/Tencent/Users/1320503165/QQ/WinTemp/RichOle/TPFTNY07I$[JCF%7DNKUYDLNQ.png[/img]
3 Z$ s+ Y6 O5 j
[img]file:///C:/Users/Victor/AppData/Roaming/Tencent/Users/1320503165/QQ/WinTemp/RichOle/TPFTNY07I$[JCF%7DNKUYDLNQ.png[/img]
; y9 b0 E0 y6 b

通过systemctl get-default 命令获取当前模式：

8 u0 E; o2 c$ v' K3 p

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

7 T. z) ]  E, i! E4 l" h

admin

centos图形界面安装
# x. N! G" N, D( f' j8 p 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]
" N8 d$ J& W( L5 Q
# I% N( c1 m# d. ^" j# cat /etc/inittab # inittab is no longer used when using systemd. #
9 [8 |# r+ h' l: {4 | # 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: #
# multi-user.target: analogous to runlevel 3                \\运行级别3：多用户界面
7 n6 o2 p0 q! N8 E4 z& v( Q% V# graphical.target: analogous to runlevel 5                  \\运行级别5：图形化界面 #
5 p) q* n& [* P# To set a default target, run: #
( b0 m" ]$ ]- s. a8 G/ S # ln -sf /lib/systemd/system/.target   /etc/systemd/system/default.target

/ r, c# A3 b7 J# [root@localhost Desktop]

# systemctl set-default graphical.target \\设置默认图形化运行级别
* N3 Y! x5 |& P) \1 }* b$ T. ]rm '/etc/systemd/system/default.target' 、
& n- F+ H3 I, ^) qln -s '/usr/lib/systemd/system/graphical.target' '/etc/systemd/system/default.target'

: e) L' ^' V: r0 n/ f. m [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+ w& E# `: t! E6 m
[root@localhost Desktop]# cat /etc/inittab
/ K& k- H3 h+ Q" _# inittab is no longer used when using systemd.
: K+ G2 ~* ?  z8 s: ], Z( c: a# # ADDING CONFIGURATION HERE WILL HAVE NO EFFECT ON YOUR SYSTEM.
* ~" y" h' E6 M6 Q% p# # Ctrl-Alt-Delete is handled by /etc/systemd/system/ctrl-alt-del.target
1 M3 {$ E2 m" o2 P: l! j# # systemd uses 'targets' instead of runlevels. By default, there are two main targets:
# P* @' x8 O7 N( P/ B# # multi-user.target: analogous to runlevel 3                \\运行级别3：多用户界面
9 ?6 X, x7 E6 O# 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 #
/ O  ^: y- P4 Z/ E2 k9 o [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'

[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

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：
7 Q, D. _5 W' R) _* q5 u$ wmulti-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"