Linux system is CentOS Linux release 7.4.1708

Python is deleted by manual, manual, and manual, which makes yum unavailable. Baidu, after reinstalling yum and python, always reported all kinds of errors. After suffering, I finally summed up a set of personal tests, which can be used and shared.

1. Uninstall existing python first

   rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps #Uninstall python
   whereis python |xargs rm -frv	 ##Delete all remaining files
   whereis python ##Verify delete, no result returned

    

2. Delete existing yum

   rpm -qa|grep yum|xargs rpm -ev --allmatches --nodeps #Delete yum
   whereis yum |xargs rm -frv #Delete residual files
   whereis yum #Verify deletion complete

3. Download source found
   First of all Here Find the corresponding version of the server, as shown in 7.4.1708 Here Directory to find the corresponding version of rpm, replace the following file.

4. Download and install. Pay attention to the order. Install python first and then yum. Otherwise, an error will be reported after installation, and it will be repeated.

   # python installation
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-2.7.5-58.el7.x86_64.rpm
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-devel-2.7.5-58.el7.x86_64.rpm
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-libs-2.7.5-58.el7.x86_64.rpm
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/rpm-python-4.11.3-25.el7.x86_64.rpm
   
   # yum installation
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/yum-3.4.3-154.el7.centos.noarch.rpm 
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm 
   rpm -ivh  --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-42.el7.noarch.rpm

5. Verification

   #Verify python
   python
   #Verify yum
   yum