Very recently I have started upgrading my FC-2 to FC-3 through yum. Following site : http://www.brandonhutchinson.com/Upg..._with_yum.html. The first obstrucle I faced that $ wget http://fedora.glorb.com/core/3/i386/os/ Fedora/RPMS/fedora-release-3-8.i386.rpm
$ wget http://fedora.glorb.com/core/3/i386/...1-3.noarch.rpm - the sites are not available. So, I changed it to http://download.fedora.redhat.com and the rest is same. Secondly
most of my FC-2 yum needed to be changed. The yum upgraded version I installed was renamed as yum.conf.rpmnew and it does not contain any repository. After yum upgrade : I followed the error messages and accordingly corrected my yum conf file. If anybody is interested I can post my yum.conf here. But there are still some glitches to be iron out. Certain GPG Keys are not available with the [Extra] which is in my case livna.org and redhat.com which has specfied its GPGKEY address and I have included the same in my yum file. But still it is giving GPG KEY not found error message.
Any help on this ?

rngband

Well, your trouble is because FC2 is completely unsupported and FC3 is supported only (just) by the fedora legacy project. You will have to use their repo for your yum.conf

If you are going to all that yum trouble, you may as well try upgrading to FC6!

However - fedora upgrades are not very good. You are best to do a complete install. Backup everything, and, in future, make sure you have a separate partition for your /home directory (at least) so you won't lose this stuff on the next install.

http://www.fedorafaq.org/

He's right considering that FC5/6 are the FC releases that are being supported. Might as well upgrade or do a clean install of FC6.