After installing new versions of Ruby on Rails through RailsInstaller my command line prompt changed to unknownf81edfdc0983. Why is this happening, and how do I switch it back to normal? It used to display my computer's name (i.e. gabriels-MacBook-Pro). I have rebooted and restarted my terminal, and I don't think I'm running any Ruby in my profile. My computer name on System Preferences is Gabriel’s MacBook Pro. Can somebody help?