server questions

[Andrew Gould]

Are Ubuntu or OpenSUSE easy to administer from the command line
without breaking the installed system configuration tools (yast, etc)?

Can anyone recommend a good tutorial on iptables?

Background:  I used to run a FreeBSD server with ssh and https exposed
to the internet.  I used pf for firewalling and secure web for forums
and webdav.  I'd like have a similar setup again.  I'm purchased a
zotac zbox id40 (atom d525 dual core, upgraded to 4gb ram) for lower
energy use.  The wireless adapter, ralink 2860, works in OpenSUSE 11.3
and 11.4 but not FreeBSD.

I know Slackware is supposed to be good from the command line, but I'd
like a distro that supports postgresql (packages, updates, etc).

Thanks,

Andrew