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I have Ubuntu 11.04 installed in my laptop and tried to upgrade it by opening the update manager and and making the necessary settings in settings - updates - release upgrade - normal releases and then hitting the check button. But nothing appeared indicating later version is available to be upgraded. When I run the following

sudo apt-get dist-upgrade

below is the result that appeared.

Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Also I am unable to watch YouTube videos in the Firefox 15.0 in my Ubuntu 11.04.

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Try sudo apt-get update && sudo apt-get upgrade first. –  Mitch Sep 10 '12 at 13:43
    
@Mitch:Even this too I did before my post on this forum, for which the following was the beginning, middle and ending portion of the output. Get:1 ftp://ftp.iitb.ac.in natty InRelease Ign ftp://ftp.iitb.ac.in natty InRelease Get:2 ftp://ftp.iitb.ac.in natty-updates InRelease ... Err http://ppa.launchpad.net natty InRelease and W: Failed to fetch http://archive.canonical.com/ubuntu/dists/CODENAME/Release.gpg Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Thanks for the reply –  Kasi Sep 11 '12 at 11:23
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1 Answer 1

Do as Mitch Said:

then type this command in the Terminal:

do-release-upgrade
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I did the one you suggested for which the following is the result Checking for a new ubuntu release No new release found Appreciate further help –  Kasi Sep 11 '12 at 11:34
    
ok try this one: do-release-upgrade -d –  Suhaib Sep 11 '12 at 16:18
    
:Tried do-release-upgrade-d for which also the same Checking for a new ubuntu release No new release found was appeared. :( –  Kasi Sep 11 '12 at 19:49
    
Appreciate further help –  Kasi Sep 13 '12 at 7:26
    
This won't likely be sufficient to solve the current problem, but please note that, to succeed, do-release-upgrade must be run as root (so run sudo do-release-upgrade instead). –  Eliah Kagan Oct 1 '12 at 21:52
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