Command Line Way to Upgrade Ubuntu

Before upgrading to Ubuntu 17.04 Zesty Zapus, please make sure to update and upgrade the current Ubuntu release using the following commands:

sudo apt update
sudo apt upgrade
sudo apt dist-upgrade

Now run the following command to install update-manager-core package:

sudo apt install update-manager-core

Once the update-manager-core package is installed, edit the /etc/update-manager/release-upgrades file and set Prompt value to normal. Prompt=normal

sudo gedit /etc/update-manager/release-upgrades

Now finally, run do-release-upgrade command to upgrade to Ubuntu 17.04 Zesty Zapus:

sudo do-release-upgrade -d

Once upgrade process is finished, restart the system and check the Ubuntu version using the following command:

lsb_release -a