# yum update 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: 2.6.8 (unknown, Nov 7 2012, 14:47:34) [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