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Dov
Asked: 2016-03-19 09:15:03 +0800 CST

14.04 Can't do updates, can't update to 15

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I recently tried to install a few packages on ubuntu 14.04 and they failed. At first I thought it was just one package, but it is a general failure of apt-get. For example:

$ mono

The program 'mono' is currently not installed. You can install it by typing:
sudo apt-get install mono-runtime

and when I try to install:

$ sudo apt-get install mono-runtime
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 linux-signed-image-3.16.0-62-generic : Depends: linux-image-3.16.0-62-generic (= 3.16.0-62.83~14.04.1) but 3.16.0-62.82~14.04.1 is to be installed
 mono-runtime : Depends: mono-runtime-sgen (= 3.2.8+dfsg-4ubuntu1.1) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

I thought perhaps 14.04 is in end of life so I looked into upgrading. But the updater crashes with a requester:

Check if you are using third party repositories. If so disable them, since they are a common source of problems.
Furthermore run the following command in a Terminal: apt-get install -f

I unclicked and removed all third party repositories. Same error. How can I uncorrupt? What is even wrong?

updates

1 Answers

  1. After removing and purging all 3rd party repository, run 'sudo apt-get update && sudo apt-get install -f && sudo apt-get dist-upgrade -y'

    Hope it will help, thanks

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