donavan@lapster:~$ sudo apt-get install python-celementtree Reading package lists... Done Building dependency tree Reading state information... Done python-celementtree is already the newest version. python-celementtree set to manual installed. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. donavan@lapster:~/.evolution$ 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 cElementTree 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: 2.5.1 (r251:54863, Oct 5 2007, 13:36:32) [GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] If you cannot solve this problem yourself, please send this message to .