> If you have Fedora just open /etc/redhat-release
> file and change this value "Fedora Core release 1
> (Yarrow)" to this value
> "Red Hat Enterprise Linux ES release 3 (Taroon)"
> and voila.... installation is done without any error.

IKA, I LOVE YOU!! And Oracle! Whoever thought (among those of us who have tried to install Oracle on an unsupported Linux) that such a simple and stupid tweek would fix the whole thing? Even the Database Configuration Assistant (dbca) worked!

For everyone else, these are the steps I followed:
0. Created a "dba" group, an "oracle" user in that group, and logged in as oracle. (It won't let you install as root). Downloaded 10g for Linux from otn.oracle.com.

1. Made the change Ika mentioned (see above). After the installation I restored this to its original value. You must "su" to root to do this.

2. Ran "runInstaller" on Disk1. Selected "Standard Edition" (as opposed to Enterprise). YMMV. Cancelled the Database Configuration Assistant first time through, then ran it later by typing "dbca &" after the installation was complete.

I must say that the 10g OEM is a masterpiece! It runs on a web browser instead of an ugly JRE for Windows GUI, and the interface is better (more usable) and looks more appealing. Wow.