[iPod Touch] BSD Subsystem

Kan iemand mij uitleggen wat BSD Subsystem inhoud?

What use is the BSD Subsystem? The BSD Subsystem allows the user to interact with the OS through the command line. Though not essential, the BSD Subsystem may be required by some applications in order for them to operate correctly. If you choose not to install the BSD Subsystem in a custom installation of Mac OS X, you cannot share files via File Transfer Protocol (FTP), share your Internet connection via Internet Sharing, use Secure Shell (SSH) or Telnet, or locate services via Rendezvous.

Kom op zeg...volgende keer even zoeken op Google. :?