Centos7.3卸載自帶python導致yum不可用【解決方案】

1、查看系統版本：

cat /etc/redhat-release
CentOS Linux release 7.3.1611 (Core) 

2、刪除python及yum相關組件：

#強制刪除相關程序及關聯
#xargs：允許對輸出內容執行其他命令

刪除現有python

rpm -qa |grep python|xargs rpm -ev --allmatches --nodeps
whereis python |xagrs rm -rfv

刪除現有yum源

rpm -qa |grep yum|xargs rpm -ev --allmatches --nodeps
whereis yum |xagrs rm -rfv

3、http://mirrors.163.com/centos/7.3.1611/下載相關版本的程序及安裝包

注意：下載的版本需和系統版本相對應

wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/lvm2-python-libs-2.02.166-1.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-libs-2.7.5-48.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-ipaddress-1.0.16-2.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-backports-1.0-8.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-backports-ssl_match_hostname-3.4.0.2-4.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-2.7.5-48.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-setuptools-0.9.8-4.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-kitchen-1.1.1-5.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/python-chardet-2.2.1-1.el7_1.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/rpm-python-4.11.3-21.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/yum-utils-1.1.31-40.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/yum-3.4.3-150.el7.centos.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/yum-plugin-aliases-1.1.31-40.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/yum-plugin-protectbase-1.1.31-40.el7.noarch.rpm
wget http://vault.centos.org/7.3.1611/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-40.el7.noarch.rpm

4、安裝python

rpm -Uvh --replacepkgs python*.rpm
rpm -Uvh --replacepkgs lvm2-python-libs*.rpm --nodeps --force
rpm -Uvh --replacepkgs libxml2-python*.rpm

5、安裝yum

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

6、測試python、yum是否可用

python
![在這裏插入圖片描述](https://img-blog.csdnimg.cn/20200302221139739.png)
yum
![在這裏插入圖片描述](https://img-blog.csdnimg.cn/202003022211123.png)