How to find which distro of unix you are using?

[svittal]

I have a VPS server. How do I know which distro of unix I'm running on it?
When I do a 'uname -a' I get - Linux abc.abc.com 2.6.9-023stab046.2enterprise #1 SMP i686 i686 i386 GNU/Linux

How do I know what distro I'm using?

[svittal]

I tried : cat /proc/version and
cat /etc/redhat-release and found my answer.

[id10t]

/etc/issue, /etc/release, and /etc/version may exist and give info as well - I don't think there is a standard file across all distros that has the information.