Problems using the rm command

rm filename: No such file or directory

The file or directory you are trying to copy does not exist.

usage: rm [-rif] file ...

You have used a non-existent option or you have failed to give a filename or directory_name.

rm: override protection 600 for filename? y
rm: filename not removed: Permission denied

You don't have permission to remove this file or directory. Most likely you're trying to erase a system file or another user's file.