I have no name!!!!!

Huh? My thoughts entirely. I just logged into my machine at work and was presented with this prompt: I have no name!@anat0010:~> What is going on here - I've been having all sorts of weird problems relating to being unable to run openoffice, and I'm beginning to suspect that my environment is screwed (or I've been hacked). How can I go about checking whether something is wrong with my environment? Or worse still......... Cheers, Jon.