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How do I upgrade to the unreleased version of Ubuntu for testing?

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1  
In my opinion you should re-install if you want to use a beta. And it is a lot quicker than upgrading (plus you can still keep your old files). –  Rinzwind Mar 20 at 9:00
    
@datanela please, this question is a generic "how I can upgrade" don't use version specific tags for non-hardware related questions! –  Braiam Mar 20 at 23:24
    
From LTS to LTS it's always possible to upgrade, but only after there's a point release, I don't recommend you to upgrade to beta yet. –  Braiam Mar 20 at 23:25
    
@LuísdeSousa that is not what he's asking, he's asking if he can upgrade from a LTS to LTS. –  Braiam Mar 20 at 23:26
    
^^ this is the right way –  Jorge Castro Mar 20 at 23:27

5 Answers 5

up vote 42 down vote accepted

Press Alt + F2 and type update-manager -d. On the top of the window you will see an info of the new Ubuntu+1 "release".

enter image description here

However, upgrading to a development release is not recommended, as it is a unstable release.

See this question for tips when you have problems: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do?

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This won't work if you don't have the software-sources correctly configured. –  Lucio Aug 9 '13 at 5:00

To just check what type of release you can upgrade to, type:

sudo do-release-upgrade --check-dist-upgrade-only --devel-release

To effectively perform the upgrade to the development version:

sudo do-release-upgrade --devel-release

do-release-upgrade [options]

DESCRIPTION

   Upgrade  the  operating system to the latest release from the command-line.
   This is the preferred command if the machine has no graphic environment
   or if the machine is to be upgraded over a remote connection.

OPTIONS

   -h, --help
          show help message and exit

   -d, --devel-release
          Check if upgrading to the latest devel release is possible
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From 11.04 onwards,when you boot the livecd and start installing it will give a option of upgrading to 11.04. it will automatically detect installed apps and install the updated version of your apps also.

live CD : Allocate drive space

Source

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There are two ways to upgrade:

  • Upgrade using update-manager
  • Upgrade using alternate cd

However note it is not recommended to upgrade it to Ubuntu+1, since it is not stable.

Upgrade using update-manager:

Press Alt+F2 and then type update-manager -d. When update manager appears then click on upgrade.

alt text

Upgrade using alternate cd:

You can also upgrade using the alternate cd. After downloading the latest build then press Alt+F2 and enter gksu /cdrom/cdromupgrade.

Because it is a development release, you will almost certainly have problems. See: There's an issue with an Alpha Release of Ubuntu, what should I do?

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THank you @dv3500ea for editing :) –  karthick87 Jan 15 '11 at 14:48

The truly command line way is (e.g. if you don't have a gui):

sudo do-release-upgrade -d

where -d means update to a development version (like 11.04 - natty)

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2  
This works for me (Kubuntu) while update-manager does not (not present). –  sje397 May 2 '11 at 0:00
    
Checking for a new Ubuntu release Get:1 Upgrade tool signature [198 B] Get:2 Upgrade tool [1,148 kB] Fetched 1,148 kB in 6s (58.3 kB/s) authenticate 'trusty.tar.gz' against 'trusty.tar.gz.gpg' extracting 'trusty.tar.gz' Can not run the upgrade This usually is caused by a system where /tmp is mounted noexec. Please remount without noexec and run the upgrade again. –  Adithya Chakilam May 3 at 5:20

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