gistfile1.txt

$ sudo apt update && sudo apt upgrade && sudo apt autoremove 
Err:1 https://repo.skype.com/deb stable InRelease
  Could not resolve host: repo.skype.com
Err:2 http://dl.google.com/linux/chrome/deb stable InRelease
  Could not resolve 'dl.google.com'
Err:3 http://au.archive.ubuntu.com/ubuntu yakkety InRelease
  Could not resolve 'au.archive.ubuntu.com'
Err:4 http://repo.steampowered.com/steam precise InRelease
  Could not resolve 'repo.steampowered.com'
Err:5 http://deb.goaccess.io yakkety InRelease
  Could not resolve 'deb.goaccess.io'
Err:6 http://ppa.launchpad.net/dawidd0811/neofetch/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:7 http://security.ubuntu.com/ubuntu yakkety-security InRelease
  Could not resolve 'security.ubuntu.com'
Err:8 http://repo.vivaldi.com/stable/deb stable InRelease
  Could not resolve 'repo.vivaldi.com'
Err:9 http://ppa.launchpad.net/dawidd0811/neofetch/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:10 http://au.archive.ubuntu.com/ubuntu yakkety-updates InRelease
  Could not resolve 'au.archive.ubuntu.com'
Err:11 http://ppa.launchpad.net/git-core/ppa/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:12 http://au.archive.ubuntu.com/ubuntu yakkety-backports InRelease
  Could not resolve 'au.archive.ubuntu.com'
Err:13 http://ppa.launchpad.net/git-core/ppa/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:14 http://ppa.launchpad.net/libreoffice/ppa/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:15 http://ppa.launchpad.net/libreoffice/ppa/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:16 http://ppa.launchpad.net/mozillateam/thunderbird-next/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:17 http://ppa.launchpad.net/mozillateam/thunderbird-next/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:18 http://ppa.launchpad.net/nijel/phpmyadmin/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:19 http://ppa.launchpad.net/ondrej/php/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:20 http://ppa.launchpad.net/ondrej/php/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:21 http://ppa.launchpad.net/ubuntu-lxc/lxd-stable/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:22 http://ppa.launchpad.net/ubuntu-lxc/lxd-stable/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:23 http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:24 http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:25 http://ppa.launchpad.net/webupd8team/atom/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:26 http://repository.spotify.com stable InRelease
  Could not resolve 'repository.spotify.com'
Err:27 http://ppa.launchpad.net/webupd8team/atom/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'
Err:28 http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu yakkety InRelease
  Could not resolve 'ppa.launchpad.net'
Err:29 http://ppa.launchpad.net/webupd8team/sublime-text-3/ubuntu xenial InRelease
  Could not resolve 'ppa.launchpad.net'