U can try "man" for clarifiying with commands.just do:
^^ also remember "." files are hidden files as "$" files in DOS.and in Linux/UNIX-like only small letters(so no Mv) are used and SPACE must be btwn each command options(for eg: "mv <SPACE> -i) .even folders can be hidden using this way.
:~$ mv dir .dir
I think u need to see http://tldp.org and http://www.linuxcommand.org/
^ Hope that helps.also if ur new to Linux,let me remind u,ur not getting the privilages with newer Linux distros(Debian,Ubuntu,Fedora etc) running this ancient one.
And remember, the files starting with a "." are hidden files in all kinds of Unix type operating systems. Hiding files in this way does not provide real security. You might want to try using some encryption instead.