centos7查看版本

cat /etc/redhat-release // 我这边是 CentOS Linux release 7.6.1810 (Core)

强制删除已安装程序及其关联

rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps

删除所有残余文件 ##xargs,允许你对输出执行其他某些命令

whereis python |xargs rm -frv

验证删除,返回无结果

whereis python

从http://vault.centos.org/7.5.1804/os/x86_64/Packages/下载版本,大版本要对应,7.6.1810用的7.5.1804版本的

python包下载到/opt/software/python/中(wget已经不能用了,页面下载的直接拷贝文件即可,也可以在其他机器上wget)

http://vault.centos.org/7.5.1804/os/x86_64/Packages/lvm2-python-libs-2.02.177-4.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-libs-2.7.5-68.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-ipaddress-1.0.16-2.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-backports-1.0-8.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-backports-ssl_match_hostname-3.5.0.1-1.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-2.7.5-68.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-setuptools-0.9.8-7.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-kitchen-1.1.1-5.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/python-chardet-2.2.1-1.el7_1.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/rpm-python-4.11.3-32.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/yum-utils-1.1.31-45.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/yum-3.4.3-158.el7.centos.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/yum-plugin-aliases-1.1.31-45.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/yum-plugin-protectbase-1.1.31-45.el7.noarch.rpm
http://vault.centos.org/7.5.1804/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-45.el7.noarch.rpm

上面的包也可以从百度网盘下载,地址:https://pan.baidu.com/s/1h9S5jLKm9PjqPkBWQ_BC1w,密码:njyz

将上面的包放到/opt/software/python/下面,执行下面的命令

rpm -Uvh --replacepkgs python*.rpm

删除原有YUM

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

--force 即使覆盖属于其它包的文件也强迫安装

--nodeps 如果该RPM包的安装依赖其它包，即使其它包没装，也强迫安装。

rpm -Uvh --replacepkgs rpm-python.rpm yum.rpm --force --nodeps

将yum源配置为网易和阿里的开源镜像

备份原来的镜像源

cd /etc/yum.repos.d/

mkdir repo_bak

mv *.repo repo_bak/

下载阿里和网易源

wget http://mirrors.aliyun.com/repo/Centos-7.repo

wget http://mirrors.163.com/.help/CentOS7-Base-163.repo

清除系统所有的yum缓存

yum clean all

生成yum缓存

yum makecache

安装epel源

yum install -y epel-release

使用阿里开源镜像提供的epel源

wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo

再次清除系统yum缓存，并重新生成新的yum缓存

yum clean all

yum makecache

查看系统可用的yum源和所有的yum源

yum repolist enabled