https://vault.centos.org/

卸载yum，重装yum

 

系统版本：

[root@CenOS8 rpm]# cat /etc/redhat-release
CentOS Linux release 8.2.2004 (Core) 

 

1、卸载yum

1 2 3

rpm -qa|grep yum|xargs rpm -ev --allmatches --nodeps rm -rf /etc/yum.repos.d/* whereis yum|xargs rm -frv

2、验证是否删除干净：

1	whereis yum

3、下载两个对应系统版本下的rpm：yum-4.2.17-7.el8_2.noarch.rpm 、centos-repos-8.2-2.2004.0.2.el8.x86_64.rpm ，

     下载地址：https://vault.centos.org/ ，下不下来就本地rz上传：

wget  https://vault.centos.org/8.2.2004/BaseOS/x86_64/os/Packages/yum-4.2.17-7.el8_2.noarch.rpm

wget  https://vault.centos.org/8.2.2004/BaseOS/x86_64/os/Packages/centos-repos-8.2-2.2004.0.2.el8.x86_64.rpm

4、安装：

rpm -ivh  yum-4.2.17-7.el8_2.noarch.rpm 

rpm -ivh  centos-repos-8.2-2.2004.0.2.el8.x86_64.rpm

5、检查是否可以了：

yum repolist

yum update

 

上边亲测：

===========================================================================================

下边CV:

 

Linux 系统为 CentOS Linux release 7.4.1708

重装yum和python

 

1. 首先卸载现有python

   1. rpm -qa|grep python|xargs rpm -ev --allmatches --nodeps #卸载python

   2. whereis python |xargs rm -frv ##删除所有残余文件

   3. whereis python ##验证删除，返回无结果

    

2.  删除现有的yum

   1. rpm -qa|grep yum|xargs rpm -ev --allmatches --nodeps #删除yum

   2. whereis yum |xargs rm -frv #删除残留文件

   3.  

      whereis yum #验证删除完成

3. 找到下载文件源
   首先在这里找到服务器对应的版本，如 7.4.1708 进入这里目录 找到对应版本的rpm，替换下面的文件。

4. 下载并安装，注意顺序，先安装python 然后 yum。不然安装后还会报错，重新来一遍。

   1. # python安装

   2. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-2.7.5-58.el7.x86_64.rpm

   3. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-devel-2.7.5-58.el7.x86_64.rpm

   4. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-iniparse-0.4-9.el7.noarch.rpm

   5. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-libs-2.7.5-58.el7.x86_64.rpm

   6. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-pycurl-7.19.0-19.el7.x86_64.rpm

   7. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/python-urlgrabber-3.10-8.el7.noarch.rpm

   8. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/rpm-python-4.11.3-25.el7.x86_64.rpm

   9.  

   10. # yum安装

   11. rpm -ivh --nodeps http://vault.centos.org/7.4.1708/os/x86_64/Packages/yum-3.4.3-154.el7.centos.noarch.rpm

   12. 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

   13. 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. 验证 

   1. #验证python

   2. python

   3. #验证yum

   4. yum