redhat7.5更改yum源

背景：redhat7.5的yum服务是付费的，就无法愉快的使用yum安装软件，所以采取了替换为CentOs的yum工具

1.登录redhat查看yum

rpm -qa |grep yum

2.卸载yum

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

3.下载安装centos7的yum依赖

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

从上边的地址下载如下包，然后安装 rpm -ivh yum-* python-*

rpm -ivh yum-* 如果报错

选择一起安装， rpm -ivh  依赖的安装包  依赖的安装包1

检查是否安装成功 rpm -qa | grep yum 

4.新建repo 配置文件

vim /etc/yum.repos.d/CentOS-Base.repo

文件内容如下：

#CentOS-Base.repo 

# 

# The mirror system uses the connecting IP address of the client and the 

# update status of each mirror to pick mirrors that are updated to and 

# geographically close to the client. You should use this for CentOS updates 

# unless you are manually picking other mirrors. 

# 

# If the mirrorlist= does not work for you, as a fall back you can try the 

# remarked out baseurl= line instead. 

# 

# 

[base] 

name=CentOS-$7 - Base - 163.com 

#mirrorlist=http://mirrorlist.centos.org/?release=7&arch=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=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=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

5.清除缓存：

yum clean all 

6.测试下yum是否可用

安装个wget试试，安装成功即可

以上~