Take a look at https://help.ubuntu.com/community/EOLUpgrades/#Requirements .  Can you post your /etc/apt/sources.list file?

The IP that apt is looking at definitely doesn't have 12.10 or 13.04:  http://91.189.92.201/ubuntu/dists/

When I used that post I manually made the change and didn't use sed so I can't confirm that that command actually made the proper changes needed.

If you still have 12.10 then your /etc/apt/sources.list file should be something like the following:

deb http://old-releases.ubuntu.com/ubuntu/ quantal main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ quantal-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ quantal-security main restricted universe multiverse


On Sat, Dec 20, 2014 at 2:42 PM, Chris Aitken <chris@chrisaitken.net> wrote:
On 14-12-20 02:13 PM, Tim Tisdall wrote:
I had this exact issue a short while ago.  The issue is that Ubuntu no longer has any of the packages for 12.10 live so apt fails to find the files it needs to do a dist. upgrade.  I used the following post to get around this issue:  http://askubuntu.com/questions/91815/how-to-install-software-or-upgrade-from-an-old-unsupported-release/91821#91821

 I tried all those steps. 

sudo sed -i -e 's/archive.ubuntu.com\|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list
sudo apt-get update && sudo apt-get dist-upgrade
sudo apt-get update
sudo apt-get install update-manager-core
sudo do-release-upgrade
The last step gave me ...

chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

Err Upgrade tool signature                                                                                                                                                                                           
  404  Not Found [IP: 91.189.92.201 80]                                                                                                                                                                              
Err Upgrade tool                                                                                                                                                                     &nbsp ;                              
  404  Not Found [IP: 91.189.92.201 80]                                                                                                                                                                              
Fetched 0 B in 0s (0 B/s)                                                                                                                                                                     &nbsp ;                     
WARNING:root:file 'raring.tar.gz.gpg' missing
Failed to fetch
Fetching the upgrade failed. There may be a network problem.
chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$



There's more information here too:  https://help.ubuntu.com/community/EOLUpgrades/



On Sat, Dec 20, 2014 at 12:33 PM, Chris Aitken <chris@chrisaitken.net> wrote:
<snip>

The problem is that you´re using a very old version of Flash. In fact, you´re using very old version of everything, as far as I can see.

Ubuntu 12.10 - means you´re using Ubuntu from October 2012.
Firefox 29 - the one I´m using is 34.

Well, I think you should really think about updating your Ubuntu, so you´ll also have all the other softwares updated, since you´re using old repositories, with old versions of software.

OK. I'm going to upgrade. Is there an easy GUI method? System Tools > Admin > Software Updater gave me ...

Failed to download repository information.

Chris

I found some easy commands at an Ubuntu site...

sudo apt-get update
sudo apt-get dist-upgrade
sudo do-release-upgrade

That gave me ...

chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$ sudo apt-get update
[sudo] password for chris: 
Ign http://ca.archive.ubuntu.com quantal Release.gpg
Ign http://ca.archive.ubuntu.com quantal-backports Release.gpg                                                                                           

[...]

Ign http://ca.archive.ubuntu.com quantal-backports/multiverse i386 Packages/DiffIndex      
Ign http://extras.ubuntu.com quantal/main Translation-en_CA                                
Ign http://extras.ubuntu.com quantal/main Translation-en             
Err http://ppa.launchpad.net quantal/main Sources                    
  404  Not Found
Err http://ppa.launchpad.net quantal/main i386 Packages              
  404  Not Found
Ign http://ppa.launchpad.net quantal/main Translation-en_CA

[...]

Ign http://ca.archive.ubuntu.com quantal-backports/universe Translation-en
Err http://ca.archive.ubuntu.com quantal/main Sources
  404  Not Found [IP: 91.189.91.13 80]
Err http://ca.archive.ubuntu.com quantal/restricted Sources
  404  Not Found [IP: 91.189.91.13 80]
Ign http://security.ubuntu.com quantal-security/main Translation-en_CA
Err http://ca.archive.ubuntu.com quantal/universe Sources
  404  Not Found [IP: 91.189.91.13 80]
Ign http://security.ubuntu.com quantal-security/main Translation-en
Err http://ca.archive.ubuntu.com quantal/multiverse Sources
  404  Not Found [IP: 91.189.91.13 80]

[...]

Err http://security.ubuntu.com quantal-security/universe i386 Packages
  404  Not Found [IP: 91.189.88.149 80]
Err http://security.ubuntu.com quantal-security/multiverse i386 Packages
  404  Not Found [IP: 91.189.88.149 80]
W: Failed to fetch http://ca.archive.ubuntu.com/ubuntu/dists/quantal/main/source/Sources  404  Not Found [IP: 91.189.91.13 80]

W: Failed to fetch http://ca.archive.ubuntu.com/ubuntu/dists/quantal/restricted/source/Sources  404  Not Found [IP: 91.189.91.13 80]

[...]

W: Failed to fetch http://ca.archive.ubuntu.com/ubuntu/dists/quantal-backports/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.13 80]

W: Failed to fetch http://ca.archive.ubuntu.com/ubuntu/dists/quantal-backports/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.13 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.
chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$ sudo apt-get dist-upgrade
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.
chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http://www.ubuntu.com/releaseendoflife

Err Upgrade tool signature                                                                                                                                                                                          
  404  Not Found [IP: 91.189.91.15 80]                                                                                                                                                                              
Err Upgrade tool                                                                                                                                                                                                    
  404  Not Found [IP: 91.189.91.15 80]                                                                                                                                                                              
Fetched 0 B in 0s (0 B/s)                                                                                                                                                                                           
WARNING:root:file 'raring.tar.gz.gpg' missing
Failed to fetch
Fetching the upgrade failed. There may be a network problem. 
chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$ ^C
chris@owner-HP-Compaq-dc5750-Small-Form-Factor:~$ 






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