There are two ways to do this - the hard way and the easy way. First, the hard way:
- Go to http://www.oracle.com
- At the top, click on "Developers"
- At the bottom, click on Database (under "Product Centers")
- On the left, click on Downloads (in the navigation bar called "Services")
- Pick the right installer for your version of Linux and your hardware
- Download it after you affirm that you're not a terrorist
- Get X working on your Linux box (if you don't already have it working).
- Go to www.puschitz.com/OracleOnLinux.shtml and follow the directions there. Depending on your Oracle and Linux versions, there will be between 10 and 50 discrete steps. You will need to be familiar with the innards of Linux.
- Attempt to install Oracle.
- Curse. A lot.
- Remove the installation after cursing because you forgot step 34a1b.
- Do it over again.
The easy way: find someone who's done this before (like me), pay them $100 to do it, and get on with your life.
I'm serious - installing Oracle on Linux is an absolute pain in the ass. I can do it in under 4 hours and on the first try (usually) because I've done it some 10 times in the last 6 months. The only thing worse is installing Oracle on Windows Server 2003. (Possibly worse is being an Exchange administrator, but it's a toss-up.)
Being right, does not endow the right to be rude; politeness costs nothing.
Being unknowing, is not the same as being stupid.
Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence.
Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.