Centos7手殘誤刪了Python2導致系統多個功能失效

問題描述

最近需要在linux上部署項目，安裝python3。
爲了不出那麼多錯，把centos自帶的python2卸載了。
誰知道之後yum和pip都不能正常使用了。

經過一番搜索，才知道系統中多處需要python2，所以需要把python2重新裝上。

解決方案

1. 創建目錄用來存放rpm包：

mkdir /usr/local/src/python

2. 查看系統版本和位數：

• 系統版本

  lsb_release -a
  

  或

  cat /etc/redhat-release
  

• 查看位數

  getconf LONG_BIT
  

3. 進入目錄，使用wget分別下載python以及yum的rpm包

wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/lvm2-python-libs-2.02.130-5.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/libxml2-python-2.9.1-5.el7_1.2.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-libs-2.7.5-34.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-ipaddr-2.1.9-5.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-backports-1.0-8.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-backports-ssl_match_hostname-3.4.0.2-4.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-2.7.5-34.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-pycurl-7.19.0-17.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-urlgrabber-3.10-7.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-setuptools-0.9.8-4.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-kitchen-1.1.1-5.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/python-chardet-2.2.1-1.el7_1.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/rpm-python-4.11.3-17.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-utils-1.1.31-34.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-3.4.3-132.el7.centos.0.1.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-aliases-1.1.31-34.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-protectbase-1.1.31-34.el7.noarch.rpm
wget http://vault.centos.org/7.2.1511/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-34.el7.noarch.rpm

上這個http://vault.centos.org網站下載對應的包。
根據你自己系統的版本，選擇相對應的包。

PS： 可以用notepad++ 對上述網址進行處理，處理之後粘貼到命令行中即可。

4. 執行命令，開始安裝

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

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安裝成功之後，就可以測試一下yum、python是否恢復正常了。

python -V

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參考文章
https://blog.csdn.net/weixin_33734785/article/details/94164300