This happened as soon as I typed in
This also happened when I typed in
geth --rpc --fast --cache=2048
Does anybody have a fix? Keep in mind I run on virtualbox.
This will have happened because you already had an instance of Geth running.
This sort of error can happen when you try to start a second instance of Geth, and it can't grab the resources it needs because the first instance has them. When you killed Geth, you were killing the original instance.
Similar issues have come up before, though with slightly different errors. See Fatal: Error starting protocol stack: ... Access is denied