http://serverfault.com – 5 but yum is not working when i use [root@localhost ~]# rpm -q yum yum-3.2.22-26.el5 when i run [root@localhost ~]# yum update Loaded plugins: rhnplugin, security This system is not registered with RHN. RHN support will be disabled. Skipping security plugin, no data Setting up Update Process No Packages marked for Update when i tried to install another version of yum it gives [root@local (HowTos)