cheat sheets.

rm - Remove files.
        Syntax: rm [<flags>] <file(s)>
        rm main purpose is to remove files.  It will also take flags that will
        allow it to remove directories.  Wild cards are allowed as well.
        Common Flags:
                -r - remove listed files and directories plus all files in
                     those directories plus all sub-dirs and there files in
                     listed directories, etc..
                -f - don't ask if you want to remove a file.
                -i - ask before removing a file.