pour l'exemple voici le contenu sources.list (pour les débutants on ne peut le modifier qu'avec les droits root) de la knoppix qui peut très bien servir sous xandros, à cet usage je leurs conseille de ce servir de synaptic:
# Security updates for "stable"
deb [
security.debian.org] stable/updates main contrib non-free
deb [
security.debian.org] testing/updates main contrib non-free
# Stable
deb [
ftp.de.debian.org] stable main contrib non-free
deb [
ftp.de.debian.org] stable/non-US main contrib non-free
# Stable Sources
deb-src [
ftp.de.debian.org] stable main contrib non-free
deb-src [
ftp.de.debian.org] stable/non-US main contrib non-free
# Testing
deb [
ftp.de.debian.org] testing main contrib non-free
deb [
ftp.de.debian.org] testing/non-US main contrib non-free
# Testing Sources
deb-src [
ftp.de.debian.org] testing main contrib non-free
deb-src [
ftp.de.debian.org] testing/non-US main contrib non-free
# Unstable
deb [
ftp.de.debian.org] unstable main contrib non-free
deb [
ftp.de.debian.org] unstable/non-US main contrib non-free
# Unstable Sources
deb-src [
ftp.de.debian.org] unstable main contrib non-free
deb-src [
ftp.de.debian.org] unstable/non-US main contrib non-free
# Experimental
#deb [
ftp.de.debian.org] ../project/experimental main contrib non-free
# Experimental Sources
#deb-src [
ftp.de.debian.org] ../project/experimental main contrib non-free
# Java
#deb [
ftp.gwdg.de] woody main non-free
#deb-src [
ftp.gwdg.de] woody main non-free
#deb [
ftp.gwdg.de] unstable main non-free
#deb-src [
ftp.gwdg.de] unstable main non-free
# More wireless stuff
deb [
debian.isg.ee.ethz.ch] woody madwifi
deb-src [
debian.isg.ee.ethz.ch] woody madwifi
# deb [
debian.isg.ee.ethz.ch] woody airo-mpi
# deb-src [
debian.isg.ee.ethz.ch] woody airo-mpi
# deb [
ftp.tcweb.org] unstable main
# deb-src [
ftp.tcweb.org] unstable main
# NX stuff
#deb [
www.kalyxo.org] experimental main
#deb [
www.kalyxo.org] unstable main
# ndiswrapper
# deb [
rigtorp.se] unstable/
# deb-src [
rigtorp.se] unstable/
# Blades Repository (pppoeconf & co)
# deb [
people.debian.org] ./
# deb-src [
people.debian.org] ./
# deb cdrom:[Debian GNU/Linux 2.2 r3 _Potato_ - Official i386 Binary-1 (20010427)]/ unstable contrib main non-US/contrib non-US/main
# Knoppix special packages resource at LinuxTag HQ
# deb [
developer.linuxtag.net] ./
# deb-src [
developer.linuxtag.net] ./
# deb [
snapshot.debian.net] pool gcc
# deb-src [
snapshot.debian.net] pool gcc