upgrading all packages with command yum -y update ..

there was a problem importing one of the python modules
required to run yum. the error leading to this problem was: cannot open shared object file: no such file or directory

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 30 2007, 13:54:11)
[gcc 4.1.2 20070925 (red hat 4.1.2-33)]

if you cannot solve this problem yourself, please go to
the yum faq at:

.. upgrade failed!