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Having some problems! Every time I try perform the update from 12.04 to 14.04 I am met with the following error:

kev@masterpc:~$ sudo do-release-upgrade
Checking for a new Ubuntu release
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 'quantal.tar.gz.gpg' missing
Failed to fetch
Fetching the upgrade failed. There may be a network problem.

In the software centre under software sources I have used both servers (Australian & Main server) but to no avail. My network also appears to be fine!

Bubba
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1 Answers1

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Figured it out!

In the software centre -> Software sources under the updates tab you must change "Notify me of a new Ubuntu version:" set to "For long term support versions" then in a terminal run

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

Running the update command seems to be critical, so don't forget it!

Bubba
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