Required installation of untrusted package

Question

Today I was updating my Ubuntu software and suddenly a 'not possible to update because package system is broken' error came up.

Somehow I try to follow from Ubuntu community in Google and something happens when I try to update using Software Updater. The 'required installation of untrusted package, this required installing packages from unauthenticated sources'.

I tried sudo apt-get update && sudo apt-get upgrade from Google and the result is failed to fetch http://my.archive.ubuntu.com/ubuntu/dists/trusty/InRelease and many failed to fetch notifications.

Please help me because I'm new and I don't know how to fix it. Also my Ubuntu cannot connect to internet.

Answer 1

Try the following:

Code:

sudo apt-get -f install
sudo dpkg --configure -a
sudo apt-get autoremove
sudo apt-get clean
sudo rm /var/lib/apt/lists/* -vf
sudo apt-get update

Post back the errors, if any, from the 'apt-get update' output.

If there are no errors are reported then you are good to run:

Code:

sudo apt-get dist-upgrade

(The above command does NOT upgrade to next ubuntu version, it just does some smart upgrades to the present system).