What I think of home users trying to install 64-bit Oracle on 64-bit Linux is a matter of record -and I stand by everything I've written about it. So I take this opportunity now to tell you to save your time and efforts, stop reading this article and (please!) go and install 32-bit Oracle on a 32-bit O/S instead. Almost certainly, it will be quicker, less prone to error and just as functional when you're finished. But...
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But people still do what common sense and rational thought tell them not to, and quite often for perfectly good reasons (such as: 'my boss wants me to install 64-bit Oracle and I need to practice'). So for you, just this once, I decided to document a 64 bit OS-and-Oracle installation, albeit briefly and without going into the whys and wherefores too much -if you're using 64-bit software, you're obviously not mucking around with this stuff, and don't need spoon-feeding quite as much as I would normally consider appropriate.
Your operating system should be a 'proper' one: if you're doing 64-bits to start with, you don't muck around with piddly consumer-grade distros (like Ubuntu or Mandriva) whilst you're doing it. That means you use Suse Enterprise Linux 9 (SLES9), or Red Hat (RHEL) 3 or 4 ...and nothing else.
For home learning purposes, you probably don't want to pay for those sorts of distros -and yet you still need distros which are functionally the same as them. That particular piece of logic rules out Suse (because OpenSuse is not a clone of SLES, and you can't get SLES for zero cost), and rules in RHEL3 or 4 -because Centos 3 or Centos 4.4 are near-perfect clones of the Red Hat software (built from the same source code, indeed) and yet are completely free. Any other distro, and you're on your own. In particular, don't even think of using RHEL5 (or its Centos 5 clone), because that's too new and isn't a supported distro yet.
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