Did it ever happen to you that you did something along the lines of:
mv /* ./test/move I mean you don't just type that, but something similar happened to me. So what now? Are you lost? Try doing an ls... Won't work! Now you are luck if you have sash. Sash is a shell which has a lot of commands statically linked. The problem with a command similar to the one above is that the libraries are not going to be around any more and ls, mv, \ldots won't work. So you need to run /sbin/sash. If you are really lost, try
boot init=/sbin/sash
Oh yes, and remember the ls-variant? right. Use echo.