RHEL7更换yum源

1，删除注册和订阅提示

查找subscription-manager相关组件:

rpm -qa | grep subscription-manager

删除subscription-maanager相关组件:

sudo yum remove subscription-manager

查找rhn相关组件

rpm -qa | grep rhn

删除rhn相关组件:

sudo yum remove rhn-check

2,yum 安装

查询当前RHEL7.0的yum安装包:

rpm -qa |grep yum

强制删除当前yum:

rpm -qa|grep yum|xargs rpm -e --nodeps

再次查询yum是否删除:

rpm -qa |grep yum

3.解决wget无法解析DNS问题

解决方法：

a.进入/etc/resolv.conf

b.修改或增加内容：

nameserver 8.8.8.8

4.下载所需的安装包

http://mirrors.163.com/centos/7/os/x86_64/Packages/

ctrl + f搜索需要的 安装包

yum-plugin-fastestmirror

yum-updateonboot

yum-utils

yum-metadata-parser

yum-3.4.3-163.el7.centos.noarch.rpm

5.安装

 rpm -ivh  yum-*
 #报错，依赖包版本不符：
     python-urlgrabber >= 3.10-8 被 yum-3.4.3-163.el7.centos.noarch 需要
     rpm >= 0:4.11.3-22 被 yum-3.4.3-163.el7.centos.noarch 需要

解决方法：升级

 wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-9.el7.noarch.rpm
 wget  http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-163.el7.centos.noarch.rpm
 #如果下载不了，链接过期了，自己去网易官网搜索，下载到本地，安装
 #安装
 rpm -Uvh yum-3.4.3-163.el7.centos.noarch.rpm  --nodeps
 rpm -Uvh python-urlgrabber-3.10-9.el7.noarch.rpm

重新安装其他安装包

rpm -ivh yum-*

6.更新yum源

 rm /etc/yum.repos.d/redhat.repo
 vim /etc/yum.repos.d/CentOS-Base.repo
 # 内容:

 [base]
 name=CentOS-$7 - Base - 163.com
 #mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=os
 baseurl=http://mirrors.163.com/centos/7/os/$basearch/
 gpgcheck=1
 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
 #released updates
 [updates]
 name=CentOS-$7 - Updates - 163.com
 #mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=updates
 baseurl=http://mirrors.163.com/centos/7/updates/$basearch/
 gpgcheck=1
 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
 #additional packages that may be useful
 [extras]
 name=CentOS-$7 - Extras - 163.com
 #mirrorlist=http://mirrorlist.centos.org/?release=$7&arch=$basearch&repo=extras
 baseurl=http://mirrors.163.com/centos/7/extras/$basearch/
 gpgcheck=1
 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7
 #additional packages that extend functionality of existing packages
 [centosplus]
 name=CentOS-$7 - Plus - 163.com
 baseurl=http://mirrors.163.com/centos/7/centosplus/$basearch/
 gpgcheck=1
 enabled=0
 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

清空yum缓存

yum clean all

生成缓存

yum makecache

更新成功

yum install tree

2 tree