W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:2 and /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:3
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:2 and /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:4
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:2 and /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:3
W: Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:2 and /etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list:4
...got this after doing grub upgrade
W
indicates aWarning
, you could ignore it. Or you could solve the problem by removing (or #commenting) the duplicate lines from/etc/apt/sources.list.d/ubuntu-desktop-ubuntu-ubuntu-make-xenial.list
– waltinator Sep 12 '18 at 17:56