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

   No module named urlgrabber

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:
2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)]

If you cannot solve this problem yourself, please send this
message to <yum@lists.linux.duke.edu>.

root@fs:~# apt-cache search urlgrabber
python-urlgrabber - A high-level cross-protocol url-grabber.
root@fs:~# apt-get install python-urlgrabber
Reading package lists... Done
Building dependency tree
Reading state information... Done
python-urlgrabber is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
root@fs:~#