/etc/apt/sources.list.d

sudo ls -lha  /etc/apt/sources.list.d
total 36K
drwxr-xr-x 2 root root 4.0K Feb 10 18:17 .
drwxr-xr-x 7 root root 4.0K Jan  6 22:36 ..
-rw-r--r-- 1 root root  136 Feb 10 18:04 atareao-ubuntu-telegram-bionic.list
-rw-r--r-- 1 root root  136 Feb 10 18:04 atareao-ubuntu-telegram-bionic.list.save
-rw-r--r-- 1 root root  189 Feb 10 18:04 google-chrome.list
-rw-r--r-- 1 root root  189 Feb 10 18:04 google-chrome.list.save
-rw-r--r-- 1 root root  110 Feb 10 18:04 nodesource.list
-rw-r--r-- 1 root root  110 Feb 10 18:04 nodesource.list.save
-rw-r--r-- 1 root root  193 Feb 10 18:04 vscode.list.save