How to upgrade your linux Distro

//How to upgrade your linux Distro

sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade

sudo reboot

sudo apt-get install update-manager-core
sudo do-release-upgrade

sudo do-release-upgrade -d

//After this you may run into a little snag with graphics not working if so just type this

sudo apt-get install --reinstall ubuntu-desktop
sudo reboot


https://www.digitalocean.com/community/tutorials/how-to-upgrade-to-ubuntu-16-04-lts