Computer cannot resolve localhost to self. This is hard on new users! Though a similar entry exists it does not seem to function. ping -c 3 localhost returns an unknown host. Since mysql cannot operate, many other programs will be effected as well. I have encountered this before, in previous versioin of redhat and fedora. /etc/hosts does not belong to any package according to the rpm database so perhaps: setup-2.6.1.1-1.fc6
My /etc/hosts file had an IPv6 localhost entry, but no IPv4 entry even though I was on an IPv4-only network so localhost would not resolve. This causes many problems with packages like kawa, any dssi plugins, postfix, etc.
*** This bug has been marked as a duplicate of 211800 ***