Make sure that your data are safe and that your backups are working and in a safe place: obviously not on the server you are currently upgrading!

While being logged in as root, you’ll have to edit the file /etc/update-manager/release-upgrades and set the value prompt to normal.

vi /etc/update-manager/release-upgrades
set prompt=normal

The update process will update your server to every single releases of Ubuntu (200MB download for each step and a restart required)

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

You are now on Ubuntu 10.10 Maverick Meerkat run one more time:

do-release-upgrade

You are now on Ubuntu 11.04 Natty Narwhal run one more time:

do-release-upgrade

to finally enjoy using Ubuntu 11.10 Oneiric Ocelot!

Ubuntu version names

  • Ubuntu 11.10 - the current stable version, released in October 2011, codenamed Oneiric Ocelot.
  • Ubuntu 11.04 - previous version, released in April 2011, codenamed Natty Narwhal.
  • Ubuntu 10.10 - previous version, released in October 2010, codenamed Maverick Meerkat.
  • Ubuntu 10.04 LTS - the current long term support version, released in April 2010, codenamed Lucid Lynx.
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