apt configurations are located in /etc/apt/
following is a breakdown for the different directories
-
sources.list
: This is the main list of repositories that APT will use for software package management. Each line in this file specifies a different repository. Ref:man 5 sources.list
-
sources.list.d/
: This directory allows you to add additional repository lists without modifying the mainsources.list
file. Each file in this directory should end with.list
and contain one or more repository lines, just like the mainsources.list
file. Ref:man 5 sources.list