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While upgrading Ubuntu via update manager, I'm getting this following error. After this error system is reverted back to it's original version.

W:Failed to fetch http://archive.canonical.com/dists/[distro]/partner/source/Sources  404  Not Found [IP: 91.189.92.191 80]
, E:Some index files failed to download. They have been ignored, or old ones used instead.

My sources.list

# deb cdrom:[Ubuntu 12.04.3 LTS Precise Pangolin - Release amd64 (20130820.1)]/ dists/precise/main/binary-i386/ 
# deb cdrom:[Ubuntu 12.04.3 LTS Precise Pangolin - Release amd64 (20130820.1)]/ dists/precise/restricted/binary-i386/ 
# deb cdrom:[Ubuntu 12.04.3 LTS Precise Pangolin - Release amd64 (20130820.1)]/ precise main restricted 
# See help.ubuntu.com/community/UpgradeNotes for how to upgrade to # newer versions of the distribution.
deb http://in.archive.ubuntu.com/ubuntu quantal main restricted 
deb-src http://in.archive.ubuntu.com/ubuntu quantal main restricted 

## Major bug fix updates produced after the final release of the 
## distribution. 
deb http://in.archive.ubuntu.com/ubuntu quantal-updates main restricted 
deb-src http://in.archive.ubuntu.com/ubuntu quantal-updates main restricted 

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team. Also, please note that software in universe WILL NOT receive any 
## review or updates from the Ubuntu security team.         
deb http://in.archive.ubuntu.com/ubuntu quantal universe 
deb-src http://in.archive.ubuntu.com/ubuntu quantal universe 
deb http://in.archive.ubuntu.com/ubuntu quantal-updates universe 
deb-src http://in.archive.ubuntu.com/ubuntu quantal-updates universe 

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu 
## security team.
deb http://in.archive.ubuntu.com/ubuntu quantal multiverse 
deb-src http://in.archive.ubuntu.com/ubuntu quantal multiverse 
deb http://in.archive.ubuntu.com/ubuntu quantal-updates multiverse 
deb-src http://in.archive.ubuntu.com/ubuntu quantal-updates multiverse 

## N.B. software from this repository may not have been tested as 
## extensively as that contained in the main release, although it includes 
## newer versions of some applications which may provide useful features. 
## Also, please note that software in backports WILL NOT receive any review
share|improve this question
    
You have something weird in your sources.list. Please paste it. –  Braiam Apr 2 at 2:55
1  
You might now want to upgrade to 12.10. It'll go out of production in only a couple of weeks. Then you'll have to upgrade to 13.04, then 13.10 and then 14.04. I'd rather recommend that you upgrade directly to 14.04 or do a fresh install. I don't post this as an answer, because it isn't, but it's something to think about. –  Jo-Erlend Schinstad Apr 2 at 2:56
    
I want to upgrade to 13.04, for that i'be to upgrade to 12.10 and then to 13.04 right?? –  Keerthi Apr 2 at 2:59
    
13.04 is EOL and 12.10 will become EOL soon.Rather jump directly to 14.04LTS.That's what J Schinstad says. –  Registered User Apr 2 at 3:58

1 Answer 1

up vote 1 down vote accepted

Open System Settings (a.k.a. Gnome Control Center), select Software & Updates, select tab Other Software and uncheck Canonical Partners repository.

enter image description here

You can also uncheck Source Code on the previous tab.

Run in the Terminal sudo apt-get update && sudo apt-get dist-upgrade.

Then you can do the update procedure.

share|improve this answer
    
Still I'm getting the same Error..! –  Keerthi Apr 2 at 3:05
    
Then post your /etc/apt/sources.list file as Braiam says. –  Danatela Apr 2 at 3:09
    
And see the updated answer. –  Danatela Apr 2 at 3:13
    
Got this message. bash: /etc/apt/sources.list: Permission denied –  Keerthi Apr 2 at 3:19
    
Use sudo with the command you have tried. –  Danatela Apr 2 at 3:20

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