I was installing some software on my computer (blender and openal to be exact, though I think these had nothing to do with the current situation), when all of a sudden, X applications refused to startup (while I was already in X with xfce, a terminal and firefox running)! So I logged out of X relogged in and saw that my hostname had suddenly changed from "thabox" to "-s".
What the hell??!!! How did that happen? A reboot undid this, but this is downright scary
Do I need to be worried for the security of my box. Is it possible that an external threat (hacker) did this. My firewall is up and running though, and I check if everything is in order by going to https://www.grc.com/x/ne.dll?bh0bkyd2
and have my security checked.