cat /etc/apt/sources.list
# /etc/apt/sources.list
# 09/01/2011
# Adicionar chaves GPG:
# apt-key adv –recv-keys –keyserver wwwkeys.eu.pgp.net $chave
# ou
# apt-key adv –recv-keys –keyserver keyserver.ubuntu.com $chave
# CD-ROM Debian Lenny
#deb cdrom:[Debian GNU/Linux 5.0.4 _Lenny_ – Official i386 CD Binary-1 20100131-18:53]/ lenny main
#mirros de segurança
deb http://security.debian.org/ lenny/updates main contrib
deb-src http://security.debian.org/ lenny/updates main contrib
#mirros oficiais
#deb http://ftp.us.debian.org/debian/ lenny main contrib non-free
deb ftp://ftp.br.debian.org/debian/ lenny main contrib non-free
#Backports permite a instalacao das ultimas versoes de alguns aplicativos dentro da arvore de pacotes original e oficial do Debian
deb http://backports.debian.org/debian-backports lenny-backports main
#mirros multimidia
# Lista dos mirros disponiveis: http://www.debian-multimedia.org/debian-m.php
deb http://www.las.ic.unicamp.br/pub/debian-multimedia/ stable main
deb-src http://www.las.ic.unicamp.br/pub/debian-multimedia/ stable main
#opera browser
#deb http://deb.opera.com/opera/ lenny non-free
#Freenx
#Fonte: http://wiki.debian.org/freenx
deb http://ppa.launchpad.net/freenx-team/ppa/ubuntu intrepid main
deb-src http://ppa.launchpad.net/freenx-team/ppa/ubuntu intrepid main
Documentação do apt: http://www.debian.org/doc/manuals/apt-howto/ch-basico.pt-br.html