Red Hat7更换Centos6源

RedHat使用自带的yum源是需要注册的，不想注册的可以替换本地源使用

工控机型号：QOTOM 190G4-M
系统： Red Hat Enterprise Linux Server release 6.7 (Santiago) x86_64

Red Hat Enterprise Linux ISO 镜像下载：
https://wanghualang.pipipan.com/dir/13133650-26232498-a8efb3/

软件包下载地址：
x86 地址：http://mirrors.163.com/centos/6/os/i386/Packages/
x64 地址：http://mirrors.163.com/centos/6/os/x86_64/Packages/

替换centos6源

• 卸载yum源
  rpm -qa|grep yum|xargs rpm -e --nodeps

• 安装yum软件包

rpm -ivh python-iniparse-0.3.1-2.1.el6.noarch.rpm
rpm -ivh yum-metadata-parser-1.1.2-16.el6.x86_64.rpm
rpm -ivh yum-3.2.29-40.el6.centos.noarch.rpm yum-plugin-fastestmirror-1.1.30-14.el6.noarch.rpm

• 更改yum源 ,编辑CentOS6-Base-163.repo文件，存放到/etc/yum.repo.d

[base]
name=CentOS-6 - Base - 163.com
baseurl=http://mirrors.163.com/centos/6/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#released updates 
[updates]
name=CentOS-6 - Updates - 163.com
baseurl=http://mirrors.163.com/centos/6/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-6 - Extras - 163.com
baseurl=http://mirrors.163.com/centos/6/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-6 - Plus - 163.com
baseurl=http://mirrors.163.com/centos/6/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-6 - Contrib - 163.com
baseurl=http://mirrors.163.com/centos/6/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=6$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-6

• 清除缓存文件及目录
  yum clean all
• 获取yum列表
  yum makecache

图形界面安装

• 查看当前系统运行级别
  runlevel
• 查看桌面环境的组件
  yum grouplist|more
• 安装GNOME图形界面
  yum groupinstall “X Window System” -y
yum groupinstall “Desktop” -y

安装成功后输入startx，或者init 5, 即可切换到图形界面（临时生效） 修改/etc/inittab文件中的id:3:initdefault将3改为5（永久生效）

卸载图形化界面

利用组卸载命令 yum groupremove + 组包名即可，其中组包名就是我们之前上面安装的。