what's a good distro for a linux n00b?
howdy. i want to install linux on an old computer, mainly to learn about linux, to free up resources on this machine by moving apaphe and mysql servers over (i do a lot of PHP dev. for my website), and because i may be working with Unixy stuff like Solaris, AIX etc. in my field later on.
what's the best, free, distribution for me to pick up, install, and goof around with? keep in mind i want to be able to shift to a new variation, like one mentioned above, without having to relearn everything.