How to Upgrade Ubuntu 9.10 (Karmic Koala) to Ubuntu 10.04 (Lucid Lynx)

Important Notes Before Upgrade

• Take a complete Back up all your data. There is no guarantee that all will go well.
• Before upgrading it is recommended that you read the release notes for Ubuntu 10.04, which document caveats and workarounds for known issues in this version.
• Be sure that you have all updates applied to Ubuntu 9.10 before you upgrade

Upgrading from GUI:
To upgrade from Ubuntu 9.10 Start the Update Manager from System---> Administration---> Update Manager.


Update Manager should open up and tell you: New distribution release ‘10.04 LTS’ is available.Here you need to click on Upgrade



This will show you Ubuntu 10.04(Lucid Lynx) Release notes click on upgrade



you will get a prompt for your password, enter your password

Preparing to upgrade in progress



If you are using any third party sources in your /etc/apt/sources.list file it will be disabled at the time of upgrade process click close



Setting new software channels in progress






Starting the upgrade process window click on Start Upgrade



Downloading and Installing Packages in Progress



Installing Packages Progress in Terminal


Now You might see a message for continue without installing grub.you must check the checkbox.

Cleaning Up process in Progress


Remove obsolete packages window click on remove



You need to restart the system to complete the Upgrade by clicking “Restart Now”


Upgrading fromTerminal :
            upgrading from terminal run the following command and respond to the terminal queries.

#>sudo do-realease-upgrade