Ubuntu 13.10 (Saucy Salamander) Released! Upgrade to Ubuntu 13.10 From Any Ubuntu Version

Desktop Edition

Note: You should update the system packages before you start the update process.

sudo apt-get update

Step 1: Open 'Dash' and look for 'Update Manager'. Once found, open the Update Manager.

Step 1: Open 'Update Manager' from 'Dash'

Step 2: Click on 'Settings'.

Step 2 : Settings

Step 3: Search for 'Other Software' tab and uncheck/disable all Third-party repositories.

Step 3 : Disable Third Party Repositories

Step 4: Enter the 'Updates' Tab. Look for 'Notify me of a new Ubuntu Version' and choose 'For any new Version'. Hit OK and then Close.

Step 4 : Ubuntu New Version Notification

Step 5: Re-open the Update Manager and click 'Upgrade' to start the Upgrade process.

Server Edition

Step 1: Install Core Update Manager.

sudo apt-get install update-manager-core

Step 2: Open the release file using your favorite text editor.

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

Step 3:
If you are upgrading to Normal release from LTS release, edit the following line:

Prompt=normal

If you are upgrading to LTS release from Normal release, edit the following line:

Prompt=lts

Step 4: Update the packages and proceed to the upgrade.

sudo apt-get update && sudo do-release-upgrade -d

Step 5: You will need to follow the instructions which will be displayed on screen. Once you are done with them, Congrats! You are upgraded to Ubuntu 13.10 Saucy Salamander!