来源：http://www.cnblogs.com/clover-siyecao/p/5650893.html

今天用yum安装软件的时候出现如下错误:

There was a problem importing one of the Python modules required to run yum. The error leading to this problem was:

No module named yum

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:
If you cannot solve this problem yourself,please go to the yum faq at:

http://wiki.linux.duke.edu/YumFaq

yum 错误，搜索一番后知道是yum和Python是依赖关系，yum是python的模块，所以采用以下解决方案：

系统python的当前版本 Python 2.7

肯定是yum的版本与当前python的版本不一致造成的

所以修改yum的配置，修改文件： vim /usr/bin/yum

修改头#!/usr/bin/python => #!/usr/bin/python2.6