Upgrade Ubuntu Hardy Heron Server 8.04 To Ubuntu Server 8.10 Intrepid Ibex

Q. How do I upgrade my server system from Ubuntu hardy heron version 8.04 to Ubuntu Linux server 8.10 Intrepid Ibex over ssh session?

A. You can do network upgrade for Ubuntu Servers from 8.04 to 8.10 using a shell prompt over remote ssh session as follows:

Ubuntu Server 8.10 Network Upgrade

Login using ssh for remote server or open console for local server

WARNING! These examples are for SERVER edition. For desktop upgrade see this FAQ.

Apply patches

First, make sure your server is up to date with 8.04 version. Type the following two command to apply all upgrades:
$ sudo apt-get update
$ sudo apt-get upgrade

Change release

Open /etc/update-manager/release-upgrades file:
$ sudo bash
# vi /etc/update-manager/release-upgrades
Find line:
Prompt=lts
Change to:
Prompt=normal
Save and close the file. This will set release update from LTS (long support version) to latest 8.10 version.

Ubuntu 8.10 Server Upgrade

Type the following command to upgrade update manager, enter:
$ sudo apt-get install update-manager-core
Above will install / update update-manager-core if it is not already installed. Once installed just update system using the following command. Make sure you have backup of all important data:
$ sudo do-release-upgrade
Now, just follow the on-screen instructions.