清除旧 yum 版本
rpm -qa|grep yum rpm -qa|grep yum|xargs rpm -e --nodeps
下载并安装新 yum 安装包
# 下载 wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-3.4.3-168.el7.centos.noarch.rpm wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-rhn-plugin-2.0.1-10.el7.noarch.rpm wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-utils-1.1.31-54.el7_8.noarch.rpm wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm # 安装 rpm -ivh *.rpm
配置 yum 源
vim /etc/yum.repos.d/Centos7-Base.repo
[base] name=CentOS-7 - Base #mirrorlist=http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=os baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/7/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 #released updates [updates] name=CentOS-7 - Updates #mirrorlist=http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=updates baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/7/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 #additional packages that may be useful [extras] name=CentOS-7 - Extras #mirrorlist=http://mirrorlist.centos.org/?release=7&arch=$basearch&repo=extras baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/7/extras/$basearch/ gpgcheck=1 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-7 - Plus baseurl=http://mirrors.tuna.tsinghua.edu.cn/centos/7/centosplus/$basearch/ gpgcheck=1 enabled=0 gpgkey=http://mirrors.tuna.tsinghua.edu.cn/centos/RPM-GPG-KEY-CentOS-7
清除 yum 缓存
yum clean all yum makecache