With lots of study in forums answered to the title, I am not able to solve. Please help !!!!
I am getting this when I run update via apt-get update every time.
sudo -i apt-get clean cd /var/lib/apt mv lists lists.old mkdir -p lists/partial apt-get clean apt-get update
The code does not work even after performing reboot
Also, I tried importing key
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5 and shows gpg unprocessed: 1
Distributor ID: Ubuntu Description: Ubuntu 14.04.4 LTS Release: 14.04 Codename: trusty