centos7誤刪除python2.7致使的python和yum不可用處理

centos7誤刪除python2.7後致使yum不可用：

問題截圖

解決方法：

一、在opt目錄下建立site_package/python3遞歸目錄，而後下載如下RPM包，並存入/opt/site_package/python3目錄中

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

二、執行下面的命令，安裝python開頭的RPM包
執行下面的命令

rpm -Uvh --replacepkgs python*.rpm

三、刪除原有yum源

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

四、安裝rpm-python起始， yum起始開頭的RPM包
–force 即便覆蓋屬於其它包的文件也強迫安裝
–nodeps 若是該RPM包的安裝依賴其它包，即便其它包沒裝，也強迫安裝

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

五、將yum源配置爲阿里的開源鏡像

備份原來的鏡像源
cd /etc/yum.repos.d/
mv CentOS-Base.repo CentOS-Base.repo.back

六、下載阿里yum源

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

將Centos-7.repo重命名爲CentOS-Base.repo

清除系統全部的yum緩存

yum clean all

生成yum緩存

yum makecache

七、安裝epel源

yum install -y epel-release

使用阿里開源鏡像提供的epel源
wget -O /etc/yum.repos.d/epel-7.repo http://mirrors.aliyun.com/repo/epel-7.repo

再次清除系統yum緩存，並從新生成新的yum緩存

yum clean all
yum makecache

查看系統可用的yum源和全部的yum源

yum repolist enabled

八、如今能夠正常使用python2.7了