centOS操作系统下如何重装yum

centOS操作系统下如何重装yum

1、查看已安装的yum

rpm -qa|grep yum

2、删除已有的yum

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

3、下载以下安装包

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/python-2.7.5-89.el7.x86_64.rpm

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm

如果找不到以上版本，可以到http://tel.mirrors.163.com/centos/7/os/x86_64/Packages/下载最新版本

4、安装

rpm -ivh python-2.7.5-89.el7.x86_64.rpm python-iniparse-0.4-9.el7.noarch.rpm --nodeps --force

rpm -ivh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm --nodeps --force

rpm -ivh yum-3.4.3-168.el7.centos.noarch.rpm yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm --nodeps --force

5、更改yum源

1）备份、下载配置文件

a.首先备份/etc/yum.repos.d/CentOS-Base.repo

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

b.

wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

c.运行以下命令更新缓存

yum clean all
yum makecache