Editar o sources.list com Geditgedit /etc/apt/sources.list
#segurança deb http://security.debian.org/ squeeze/updates main deb-src http://security.debian.org/ squeeze/updates main #debian # deb http://http.us.debian.org/debian/ squeeze main contrib non-free # deb ftp://mirrors.kernel.org/debian/ squeeze main contrib non-free # deb http://download.unesp.br/linux/debian/ squeeze main contrib non-free deb http://ftp.br.debian.org/debian/ squeeze main contrib non-free deb-src http://ftp.br.debian.org/debian/ squeeze main contrib non-free #som video # deb ftp://ftp.debian-multimedia.org squeeze main non-free deb http://www.debian-multimedia.org squeeze main non-free #backports # gpg --keyserver subkeys.pgp.net --recv-keys EA8E8B2116BA136C # gpg --export --armor EA8E8B2116BA136C | apt-key add - # deb ftp://sft.if.usp.br/debian-backports/ squeeze-backports main # deb http://sft.if.usp.br/debian-backports/ squeeze-backports main # deb http://backports.debian.org/debian-backports squeeze-backports main # deb http://ftp.br.debian.org/debian-backports/ squeeze-backports main deb ftp://ftp.br.debian.org/debian-backports/ squeeze-backports main #este volatile veio ja com instalacao # Line commented out by installer because it failed to verify: deb http://volatile.debian.org squeeze-updates main # Line commented out by installer because it failed to verify: deb-src http://volatile.debian.org squeeze-updates main
depois execute:
apt-get update
e também instale as chaves do endereços
apt-get install debian-multimedia-keyring debian-keyring