Once upon a time Antonio Rodriguez said...
When capturing a file from an url with the command
mplayer -dumpstream -dumpfile archive.rm -playlist url
and other variants, by misplacing the option -rtsp-stream-over-tcp a
file was created with this name, i.e.,
-rtsp-stream-over-tcp is the filename.
Two common ways:
rm -- -rtsp-stream-over-tcp
or
rm ./-rtsp-stream-over-tcp
In the first case, the -- tells rm to stop processing options, in the
second case you're finding a way to refer to the same file in such a way
that it does not start with -.