Help! Pismo booting to command line?

[TL]

something about a startup file? Not sure, as the text on screen has changed. at the moment it reads the following:

"Darwin/BSD (Pismo.local) (console)

login:"

I guess i should make clear i know nothing about Unix, and even less about the console/command line.

Update: Finally managed to get it to boot to the OS disk. Running Disk Utility now. Crossing fingers...