cmd not found

new qnx user. have been using redhat since version 5. i have this qnx
2.2 system at work trying to back it up to floppy, but i was messing
around and i listed some directories to a file called files but then
deleted that and now whenever i try to use the command it says cmd not
found. am i screwed or is it still there and is there some way to recover?
i have other systems with exactly the same setup so if i can create a
floppy or something to recover from this. any help would be greatly