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http://www.raspbmc.com/ Raspieman says Excellent Raspberry Pi Distribution. with XBMC Welcome to the home of Raspbmc, the simplistic yet powerful Raspberry Pi media center distribution, created by Sam Nazarko!
Raspbmc is a minimal Linux distribution based on Debian that brings XBMC to your Raspberry Pi. This device has an excellent form factor and enough power to handle media playback, making it an ideal component in a low HTPC setup, yet delivering the same XBMC experience that can be enjoyed on much more costly platforms. Raspbmc is brought to you by the developer of the Crystalbuntu Linux Distribution, which brings XBMC and 1080p decoding to the 1st generation Apple TV.
Here’s why you might like Raspbmc:
Free and open source.
No knowledge of Linux is needed. If you want to use the Raspberry Pi as an XBMC frontend you can do exactly that with no knowledge of how anything works.
It can be installed with a few simple clicks from a Mac or a PC running Windows or Linux.
It’s auto updating, meaning you constantly get new features, performance and driver updates. You can however turn updates off at any time.
It supports 1080p playback.
Share your content from your PC over NFS, SMB, FTP and HTTP.
AirPlay and AirTunes support allow you to send music and video from your iDevice to the TV.
Full GPIO support!
As it is a Debian system, it is completely expansive and you can install any packages from Debian’s massive repository!
… and much more!
To update Debian Raspberry pi :
APT is an advanced interface to the Debian packaging system. It features complete installation ordering, multiple source capability and several other unique features, see the User’s Guide in /usr/share/doc/apt-doc/guide.html/index.html (you will have to install the apt-doc package).
aptitude is the recommended package manager for Debian GNU/Linux systems. It is a text-based interface to APT using the curses library, and can be used to perform management tasks in a fast and easy way.
Before you can use aptitude, you’ll have to edit the /etc/apt/sources.list file to set it up. If you wish to upgrade to the latest stable version of Debian, you’ll probably want to use a source like this one:
http://ftp.us.debian.org/debian stable main contrib non-free
More details on this can be found in the sources.list(8) manual page.
To update your system, run