I think there are really lots people like me, just use yum to upgrade without download iso files.
This artile is very clear:How to upgrade from FC4 to FC5 via yum?
The major steps:
- Download fedora-release-5-5.noarch.rpm, then install it
- Upgrade yum first: yum update yum
- And upgrade whole distribution: yum upgrade
You may meet dependency problems in step 2 and step 3. If you met, you can refer to this article, it provide a perl script to resolve dependency problem.
My way is to record this packages, remove them. After upgraded, install them back.
Now I had upgraded my distribution to Fedora Core 5, the next thing is adjusting my configuration~