概述

因为非常复杂的原因导致系统无法使用yum命令，并提示如下错误。

[root@localhost ~]# yum list wget
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:

   No module named sqlitecachec

Please install a package which provides this module, or
verify that the module is installed correctly.

It's possible that the above module doesn't match the
current version of Python, which is:
2.6.6 (r266:84292, Feb 22 2013, 00:00:18) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-3)]

If you cannot solve this problem yourself, please go to 
the yum faq at:
  http://yum.baseurl.org/wiki/Faq

解决办法

[root@localhost ~]# rpm -q yum-metadata-parser
yum-metadata-parser-1.1.2-16.el6.x86_64
[root@localhost ~]# rpm -Uvh --replacepkgs yum-metadata-parser-1.1.2-16.el6.x86_64.rpm