OSDev.org

hi
can someone please explain to me how to add commands to my os.
it uses *nix commands so far i can only get VER (version) and EXIT to work
i cant find anything on the web about it So any help would be useful.

It depends on how you design your os.
Commands in Dos, as far as im aware used built in commands to the command prompt. Linux however, has programs in dir's that get run to perform a task and quit when the task is done.
i.e. ls command in linux is a file under /usr/bin i think, or maybe just /bin i can't remember.
Basically these different methods are called internal and external commands to the shell.
Shells have commands that can be used to make shell scripts. a series of commands peformed by the shell that closely resembles a programming language.