"duplicate sources" warnings on apt-get update

setup is: 410C with Ubuntu - Release 15.06 - connected to network via WIFI.

When I do sudo apt-get update it starts to run as normal, but always ends with several “duplicate sources” warnings, then says “you may want to run apt-get update to correct these problems”

Ok so I run it again - same thing.

Are others seeing this? It doesn’t give you a comfortable feeling that things are right with the repos and packages. I wonder if this causes any problems or is it ok to ignore?


Hi Matt,

It turns out there actually is a duplicate, in both sources.list and sources.list.d/hwpack.ubuntu.list:

sources.list:deb Index of /ubuntu-ports vivid main universe
sources.list.d/hwpack.ubuntu.list:deb http://ports.ubuntu.com/ubuntu-ports vivid main universe

This warning can be fixed by, e.g., commenting out or removing the line in hwpack.ubuntu.list.

However, it seems harmless – some of our 410Cs have been completely fine running without the fix.


Brain Corporation: Computer vision and machine learning for robotics.

i confirm it’s a harmless warning. can you please file a bug on https://bugs.96boards.org/enter_bug.cgi?product=Dragonboard%20410c, so that we keep track of it? i will clean it up in a future release.