Basic procedure:
yum update — puts on the latest packages
yum clean all — deletes the downloaded files
rpm -Uvh
ftp://linux.fnal.gov/linux/lts30x/i386/sites/Fermi/misc/RPMS/yum-conf-30x.LTS.noarch.rpm –gets the latest yum.conf file
yum -d1 update yum — always update yum
yum update Fermi-release
yum upgrade
(check grub.conf to make sure ok)
yum clean all
reboot
YUM COMMANDS
yum info perl — gives same output as rpm -qi perl
yum provides /bin/login — same as rpm -qf /bin/login
yum install perl — installs perl
yum remove perl — removes perl
yum list
yum list updates
yum list installed
yum list [packagename]