Hm, since the server is working fine except for certain Perl scripts (not all), it's mainly a Postfix server which is still delivering enterprise mail successfully, and that this problem wasn't happening until I installed a big bunch of modules, that comment isn't particularly helpful. I'd love to know which "computer skills" I'm supposed to be improving here (although I'll cop to the "install only ONE thing a time" issue).

I don't pretend to be a Linux expert, but it concerns me that installing modules means "reformat your server". And people bitch about Windows.