acob@RAILX-Precision-5520:~$ cd /etc/apt
jacob@RAILX-Precision-5520:/etc/apt$ ls
apt.conf.d     sources.list   sources.list.d     trusted.gpg   trusted.gpg.d
preferences.d  sources.list~  sources.list.save  trusted.gpg~
jacob@RAILX-Precision-5520:/etc/apt$ cd sources.list.d
jacob@RAILX-Precision-5520:/etc/apt/sources.list.d$ ls
dropbox.list                         ubuntu-wine-ubuntu-ppa-xenial.list.save
dropbox.list.save                    virtualbox.list
google-chrome.list                   virtualbox.list.save
google-chrome.list.save              xenial-dell-berlinetta-p-mlk.list
shutter-ubuntu-ppa-xenial.list       xenial-dell-berlinetta-p-mlk.list.save
shutter-ubuntu-ppa-xenial.list.save  xenial-dell.list
ubuntu-wine-ubuntu-ppa-xenial.list   xenial-dell.list.save