==== Standard Buster sources.list ====

<code>deb http://deb.debian.org/debian buster main contrib non-free
deb-src http://deb.debian.org/debian buster main contrib non-free
 
deb http://deb.debian.org/debian-security/ buster/updates main contrib non-free
deb-src http://deb.debian.org/debian-security/ buster/updates main contrib non-free
 
deb http://deb.debian.org/debian buster-updates main contrib non-free
deb-src http://deb.debian.org/debian buster-updates main contrib non-free
 
#deb http://deb.debian.org/debian buster-backports main contrib non-free
#deb-src http://deb.debian.org/debian buster-backports main contrib non-free</code>