/etc/apt/:
total 68
drwxr-xr-x 2 root root  4096 Dec 28 14:11 apt.conf.d
drwxr-xr-x 2 root root  4096 Apr 10  2014 preferences.d
drwxr-xr-x 2 root root  4096 Dec 26 15:57 sources.list.d
-rw-rw-r-- 1 root root  2516 Dec 26 15:57 sources.list.distUpgrade
-rw-rw-r-- 1 root root  2394 Dec 27 13:04 sources.list.save
-rw------- 1 root root    40 Apr 17  2014 trustdb.gpg
-rw-r--r-- 1 root root 18766 Jan 13  2016 trusted.gpg
-rw-r--r-- 1 root root 17552 Feb 18  2015 trusted.gpg~
drwxr-xr-x 2 root root  4096 Dec 28 13:27 trusted.gpg.d