nkz@darkstar:~$ sudo apt-get update
Ign:1 http://dl.google.com/linux/chrome/deb stable InRelease
Hit:2 http://ba.archive.ubuntu.com/ubuntu xenial InRelease                     
Hit:3 http://ba.archive.ubuntu.com/ubuntu xenial-updates InRelease             
Hit:4 http://ba.archive.ubuntu.com/ubuntu xenial-backports InRelease           
Hit:5 http://security.ubuntu.com/ubuntu xenial-security InRelease              
Hit:6 http://dl.google.com/linux/chrome/deb stable Release                     
Hit:8 http://ppa.launchpad.net/numix/ppa/ubuntu xenial InRelease               
Reading package lists... Done                      
N: Ignoring file '20auto-upgrades.ucf-dist' in directory '/etc/apt/apt.conf.d/' as it has an invalid filename extension