Centos 重装Python2.7

一、删除现有的python

[root@test ~]# rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps ##强制删除已安装程序及其关联
[root@test ~]# whereis python |xargs rm -frv ##删除所有残余文件 ##xargs，允许你对输出执行其他某些命令
[root@test ~]# whereis python ##验证删除，返回无结果

二、删除现有的yum

1 2	`[root@test ~]# rpm -qa\|grep yum\|xargs rpm -ev --allmatches --nodeps` `[root@test ~]# whereis yum \|xargs rm -frv`

三、从中科，163或者阿里云镜像下载相对应的包

下载地址：

中科： http://mirrors.ustc.edu.cn/centos/7/os/x86_64/Packages/
163 ： http://mirrors.163.com/centos/7/os/x86_64/Packages/
阿里： https://mirrors.aliyun.com/centos/7/os/x86_64/Packages/

下载清单：根据最新版本酌情选择
python-libs-2.7.5-48.el7.x86_64.rpm，被python依赖
python-2.7.5-48.el7.x86_64.rpm
python-iniparse-0.4-9.el7.noarch.rpm，被yum依赖
python-pycurl-7.19.0-19.el7.x86_64.rpm, 被python-urlgrabber依赖
python-urlgrabber-3.10-8.el7.noarch.rpm ，被yum依赖
rpm-python-4.11.3-21.el7.x86_64.rpm ，被yum依赖

下载后的安装方式

#rpm -ivh xxx.rpm

以下以163为参考

#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-libs-2.7.5-89.el7.x86_64.rpm
#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-2.7.5-89.el7.x86_64.rpm
#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/python-urlgrabber-3.10-10.el7.noarch.rpm
#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/rpm-python-4.11.3-45.el7.x86_64.rpm
#rpm -ivh python-libs-2.7.5-89.el7.x86_64.rpm
#rpm -ivh python-2.7.5-89.el7.x86_64.rpm
#rpm -ivh python-iniparse-0.4-9.el7.noarch.rpm
#rpm -ivh python-pycurl-7.19.0-19.el7.x86_64.rpm
#rpm -ivh python-urlgrabber-3.10-10.el7.noarch.rpm
#rpm -ivh rpm-python-4.11.3-45.el7.x86_64.rpm

四、下载yum安装包

下载清单：根据最新版本酌情选择

yum-3.4.3-150.el7.centos.noarch.rpm, 就是它依赖了上面的python库
yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
yum-plugin-fastestmirror-1.1.31-40.el7.noarch.rpm

yum安装也按照顺序执行，在执行第一个rpm时，结尾加上 --nodeps参数强制安装

#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-metadata-parser-1.1.4-10.el7.x86_64.rpm
#wget http://mirrors.163.com/centos/7/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm
#rpm -Uvh yum-3.4.3-168.el7.centos.noarch.rpm --nodeps
#yum -Uvh yum-metadata-parser-1.1.4-10.el7.x86_64.rpm --nodeps
#yum -Uvh yum-plugin-fastestmirror-1.1.31-54.el7_8.noarch.rpm --nodeps

如果接下来还是提示yum有问题，可以通过#rpm -ivh http://mirror.centos.org/centos/7/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm --force解决

最后大功告成！！！

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