lost and found ( for me ? ): Ubuntu : how to upgrade to 12.04 LTS from 11.10

Here’s an explanation of how to upgrade to 12.04 LTS from 11.10 with update-manager.

Before upgrading

# cat /etc/lsb-release

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=11.10

DISTRIB_CODENAME=oneiric

DISTRIB_DESCRIPTION="Ubuntu 11.10"

# uname -ri

3.0.0-19-server x86_64

Launch update-manager

You’ll see “upgrade” button like below

click upgrade button.

The upgrade procedure to 12.04 LTS will be processed automatically.

When unpacking libc-bin , which is a part of “installing the upgrades” procedure , you will see the following notice.

Click OK.

In my environment , it took two hours or so to finish the upgrade.

Reboot ubuntu

Get things done !

# uname -ri

3.2.0-24-generic x86_64

# cat /etc/lsb-release

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=12.04

DISTRIB_CODENAME=precise

DISTRIB_DESCRIPTION="Ubuntu 12.04 LTS"

lost and found ( for me ? )