I'm new to CentOS, have mainly worked with FreeBSD.
How do i update/upgrade CentOS from version 4.4 to 4.8 ?
# yum upgrade
Will this upgrade only minor or will it upgrade to 5.x ?
Upgrading from 4.4 to 4.8 is a minor upgrade, and this should be fairly straight forward to do just by using yum, as a matter of fact with the default yum repos that come with your CentOS distribution it should just work out of the box doing
Upgrading from 4.4 to 5.x is a bit more of a difficult task though, for the brave souls ;) just make sure to practice it with a box that you don't really need before starting this kind of upgrade on live boxes.
http://wiki.centos.org/HowTos/MigrationGuide/ServerCD_4.4_to_5 try above link :)
or if you have 4.8 DVD then following