I see very clearly how yum accesses the CentOS repos when I look in
/etc/yum.repos.d/CentOS-Base.repo
But I don't see any equivalent file in
/etc/apt/sources.list.d
All I have in that directory are list files like
dag.list dries.list freshrpms.list ...etc..
How does apt-get know where to look for CentOS repo stuff?