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How to Upgrade Ubuntu 8.04 to 9.04

This guide will help you perform the two-step upgrade process to get an Ubuntu 8.04 server up to 9.04. This process is nearly identical for all Ubuntu release, you merely need to change the version numbers and release name (i.g. Jaunty) where appropriate.

To go from 8.04 to 8.10

  1. SSH or Console into your ubuntu server as the user root, or log in as a unprivileged user and su to root. Run each of the following:
    # apt-get update
# apt-get upgrade
# apt-get install update-manager-core
  2. Edit /etc/update-manager/release-upgrades and change prompt method to “normal”.
  3. Run:
    # do-release-upgrade

Once you run through the do-release-upgrade utility it will reboot the server. Once it comes back up your release should be 8.10. You can verify this by running lsb_release -a as root and you should see the following: 

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 8.10
Release: 8.10
Codename: intrepid

To go from 8.10 to 9.04

SSH or Console into your Ubuntu server as the user root or login as a unprivileged user and su to root. Run each of the following:

# apt-get update
# apt-get upgrade
# apt-get install update-manager-core
# do-release-upgrade

Once the upgrade utility finishes it will reboot your server, when the server comes back up it will be version 9.04. You can verify this by running lsb_release -a as root and you should see the following: 

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 9.04
Release: 9.04
Codename: jaunty

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