*i have searched some solutions about this problem. But for my situation, these solutions seem not work, and my problem still exists when using yum, it posts the following message:* 'import site' failed; use -v for traceback 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: 2.4.1 (#1, May 16 2005, 15:19:29) [GCC 4.0.0 20050512 (Red Hat 4.0.0-5)] *version information: *fedora core 4* *yum-2.4.0-0.fc4 python24-yum-2.4.0-5.py24 gnome-python2-gtkhtml2-2.10.0-2.1 gnome-python2-gconf-2.10.0-1 libxslt-python-1.1.14-2 gnome-python2-bonobo-2.10.0-1 python24-yum-2.4.0-5.py24 rpm-python-4.4.1-21 mod_python-3.1.4-2 gnome-python2-canvas-2.10.0-1 libxml2-python-2.6.19-1 python-urlgrabber-2.9.6-1 python-sqlite-1.1.6-1 gnome-python2-gnomevfs-2.10.0-1 gnome-python2-extras-2.10.0-2.1 dbus-python-0.33-3 python-ldap-2.0.6-4 MySQL-python-1.2.0-1 python-elementtree-1.2.6-4 gnome-python2-2.10.0-1 python-devel-2.4.1-2 pythonabi-2.4.1-1.rhfc4.at python-2.4.1-2* *redhat-rpm-config-8.0.34-1 rpm-4.4.1-21 rpm-python-4.4.1-21 rpm-devel-4.4.1-21 rpm-libs-4.4.1-21 rpm-build-4.4.1-21 * *