check out screen......I use it to log in to an account using irrsi....but on my server. When I close the client, screen keeps running on my server. I can ssh back in later and open up the "screen" (reattach the screen = screen -r) and it's all still there. I imagine you can ssh into your server, invoke screen and then run your command. Close the terminal and your command will still be running on your server. It is only as I am typing this that I realise how odd it all sounds.....
