更新python版本后出现此问题
[root@huntdb src]# python Python 2.7.9 (default, Apr 10 2015, 13:32:39) [root@huntdb src]# yum install openssl* 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: 2.7.9 (default, Apr 10 2015, 13:32:39) [GCC 4.1.2 20080704 (Red Hat 4.1.2-52)] If you cannot solve this problem yourself, please go to the yum faq at: http://wiki.linux.duke.edu/YumFaq
因为python新版本中没有yum模块导致，将python版本改低即可：
[root@huntdb src]# whereis python python: /usr/bin/python /usr/bin/python2.4 /usr/lib/python2.4 /usr/include/python2.4 /usr/local/python2.7 /usr/share/man/man1/python.1.gz [root@huntdb src]# vi /usr/bin/yum 修改第一行#!/usr/bin/python为#!/usr/bin/python2.4
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原文：http://hunt1574.blog.51cto.com/1390776/1630949