HOWTO : Update Ubuntu 16.04 LTS

sudo nano ~/update_ubuntu

Append the following lines to the file :

export DEBIAN_FRONTEND=noninteractive
sudo apt update
sudo apt -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" -o APT::Get::Assume-Yes="true" -y dist-upgrade
sudo apt -y autoclean
sudo apt -y --purge autoremove

Save it and make it executable.

chmod +x ~/update_ubuntu

To run it :

sudo ~/update_ubuntu

That's all! See you.