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I want to upgrade to ubuntu 12.10 from 12.04. But I am not able to do it. I don't see upgrade tab in download manager. These are the steps I followed:

  1. Open Update manager
  2. Click on settings
  3. Click on updates tab
  4. Notify me of a new version: "for any new version".

After doing this, I even restarted the machine, still I don't see upgrade tab in download manager. Plz help.

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Try to run sudo do-release-upgrade -d in a terminal and it should upgrade to Ubuntu 12,10.

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This is what I get when I apply this command :proxy 'false' looks invalid Checking for a new Ubuntu release No new release found – J Modi Feb 16 '13 at 2:45
Can you give us your etc/update-manager/release-upgrades file? – smartboyhw Feb 16 '13 at 9:29
plz find the file in 2 parts as comment does not allow more than 550 characters. First part: cat /etc/update-manager/release-upgrades # Default behavior for the release upgrader. [DEFAULT] # Default prompting behavior, valid options: # # never - Never check for a new release. # normal - Check to see if a new release is available. If more than one new # release is found, the release upgrader will attempt to upgrade to # the release that immediately succeeds the currently-running # release. – J Modi Feb 19 '13 at 17:54
# lts - Check to see if a new LTS release is available. The upgrader # will attempt to upgrade to the first LTS release available after # the currently-running one. Note that this option should not be # used if the currently-running release is not itself an LTS # release, since in that case the upgrader won't be able to # determine if a newer release is available. prompt=normal – J Modi Feb 19 '13 at 17:55
up vote 0 down vote accepted

I believe my problem was because of either/both of these reasons:

  1. I had downloaded ubuntu using Wubi and Wubi might not allow me to upgrade to later version.

  2. I had very little space available ( less than 1 GB) on Ubuntu allocated by wubi.

Anyways, Thanks guys for all your help. I hope someone else also might find my answer helpful if they also had same problem.

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