We have a client that uses a particular hosting service. They seem to be mostly Microsoft-based, but they list that they also support:
Red Hat Linux 7.0+, Red Hat Enterprise 2.1+, SuSe Enterprise Linux, Solaris 2.6+, HP-UX 11.0+
If they ask which OS we prefer, what do you recommend?
And yes, if the client will agree, I'll gladly move to a preferred Drupal/Linux specialist server host, but that may not be a choice.
So, if you HAD to pick from one of the above, what would it be?