[root@nj-ptc root]# yum check-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: 2.2.2 (#1, Feb 24 2003, 19:13:11) [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] If you cannot solve this problem yourself, please send this message to <yum@xxxxxxxxxxxxxxxxxxxx>. [root@nj-ptc root]#