I'm not sure the last time I saw this discussion, but I was somewhat curious: what would be your ideal Linux distribution for a nice solid PostgreSQL installation? We've kinda bounced back and forth between RHEL, CentOS, and Ubuntu LTS, so I was wondering what everyone else thought.
Find the one that suits *you* (or rather your employer/client) and use that ;)
We can debate the pros and cons of each and every distro, and in the end it'll be the one that suits your (or your client/employer's) needs and makes you (or your client/employer) happy that'll win the battle.
In the bigger enterprises, RHEL and SuSE typically wins.
As you go down the Centos/Fedora/Ubuntu/Debians start to become more prevalent (license costs etc.)
The questions you'll need to ask and investigate:
1) Do I want license/support that I can pay somebody to look into my OS troubles?
2) How "active" is the community for this distro?
3) Which distros are the people around you using? (ie. replacement/backups/etc.)
4) Do you want bleeding/leading/stable/old releases?
5) Can you compile from source for this?
6) What OSes are your hosting/etc. supporting? (for the servers on the net out there)