Upgrading Ubuntu 14.04,15.10 to Ubuntu 16.04 Beta (Desktops/Servers)

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Ubuntu 16.04 is the version of the Ubuntu operating system released on 21st April, 2016. The development codename given to this release is "Xenial Xerus".

Before You Start

You can directly upgrade to Ubuntu 16.04 ("Xenial Xerus") from either Ubuntu 14.04 LTS ("Trusty Tahr") or Ubuntu 15.10 ("Wily Werewolf").

Be sure that you have all updates applied to your current version of Ubuntu before you upgrade.

Before upgrading it is recommended that you read the release notes for Ubuntu 16.04, which document caveats and workarounds for known issues in this version.

This is still in beta version so not recommended for production systems and make a copy of your data before starting upgrade process

Upgrading Ubuntu Desktops 14.04,15.10 to 16.04 Beta

You can easily upgrade over the network with the following procedure.

Run the update-manager application from the Unity Dash or a command line

In Update Manager, click the Settings... button, and enter your password to start the Software Sources application.

Select the sub menu Updates from the Software Sources application.

Confirm the "Notify me of a new Ubuntu version:" option is set to "For any new version", and change it if otherwise.
Close the Software Sources application and return to Update Manager.

In Update Manager, click the Check button to check for new updates.

If there are any updates to install, use the Install Updates button to install them, and press Check again after that is complete.

A message will appear informing you of the availability of the new release.
Click Upgrade.

Follow the on-screen instructions.

Upgrading Ubuntu Servers 14.04,15.10 to 16.04 Beta

Install update-manager-core if it is not already installed:

sudo apt-get install update-manager-core

Launch the upgrade tool

do-release-upgrade

Follow the on-screen instructions.

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