up vote 18 down vote favorite
5

When trying to upgrade using the terminal, my upgrade stops. This is the line showing in the terminal:

The required dependency 'apt(>=1.0.10.2 ubuntu2)' is not installed.

my problem is that I don't know the command to install this dependency. Using other commands, it says apt is up to date. Solutions?

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Have you tried using sudo apt-get update, sudo apt-get upgrade, and sudo apt-get install -f? – Andrew Apr 30 '16 at 23:04
    
yes, i've used all those commands. first two said i was up to date but terminal didn't recognize th install -f command – paul Apr 30 '16 at 23:07
    
Have you tried sudo apt-get -y install apt ? – Andrew Apr 30 '16 at 23:11
    
answer,again is apt is already the newest version – paul Apr 30 '16 at 23:12
    
no matter the install apt command i've tried, it always says i'm up to date! – paul Apr 30 '16 at 23:13
up vote 18 down vote

Had the same problem, solved by forcing the update of apt and cleaning the current installation as Andrew suggested:

sudo apt-get update
sudo apt-get upgrade
sudo apt-get -f install   # (not "install -f"!)
sudo apt-get -y install apt
sudo do-release-upgrade
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4  
there is something else blocking my installation of apt. following the instructions listed, it still indicates that apt is up-to-date. however, when i get to do-release-upgrade, it cannot find apt, or at least the correct apt. – paul May 7 '16 at 3:27
1  
-f install and install -f make no difference. – Pilot6 Jul 31 '16 at 8:08
    
But that install from 15.10 to 16.xx sth. – marko Sep 24 '16 at 19:43
up vote 12 down vote

I had this error, for me I was missing the wily-updates line from my /etc/apt/sources.list:

deb http://archive.ubuntu.com/ubuntu/ wily-updates main restricted universe multiverse
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1  
For ARM etc. the line should be deb http://ports.ubuntu.com/ wily-updates main restricted universe multiverse – Vladimir Panteleev Aug 8 '16 at 1:46
    
I'm thinking that it should be "deb ports.ubuntu.com trusty-updates main restricted universe multiverse" (i.e., it turns on the extra repos). Mixing versions (e.g., trusty and wily) never ends well. – joat Nov 14 '16 at 9:36
    
After doing that, "apt-get update && apt-get -y upgrade && do-release-upgrade" appears to work. Note: you may need to comment out the /tmp line in /etc/fstab, to avoid running out of temporary space. – joat Nov 14 '16 at 9:54
up vote 4 down vote

I had this issue too, this will update all your goodies as well as upgrade from 15 to 16.

Go to Software and Updates > Updates

Tick On the Following

  • Wily Security
  • Wily Updates
  • Wily Proposed

Update and Upgrade Current System

sudo apt-get update && sudo apt-get upgrade

Get the Upgrade

sudo apt-get dist-upgrade

Upgrade in CLI

sudo do-release-upgrade
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up vote 1 down vote

I had the exact same problem with 'apt'. I got the solution from this link. Run sudo dpkg -l | grep apt. You may see this entry in the output of the command :

ii  apt 1.0.10.2ubuntu1      amd64         commandline package manager

If you do, you will need to get the required apt(>=1.0.10.2 ubuntu2). Here are the steps which I followed :

  1. Go to Software & Update -> Ubuntu Software . Change the Server to Main server.(in my case, I changed to Server for India). I was using a different mirror previously and hence had an older 'apt' version.

  2. Run 

        sudo apt-get update
    sudo apt-get install --reinstall apt

  3. Run sudo dpkg -l | grep apt again to check version has changed. Hopefully the entry in the output should have changed to : apt 1.0.10.2ubuntu2.

  4. Run a sudo apt-get update && sudo apt-get upgrade following which you can proceed to update to ubuntu 16.04.

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followed the advice listed. the command package manager did come up with ver. 1.0.10.2 ubuntu1. but the two commands to change to ubuntu2 did not yield a change(still ubuntu1). as this a security change, could it be caused by a security problem? – paul May 8 '16 at 18:12
    
I am by no means an expert in this, but I think an another alternative would be to use this deb to perhaps solve the problem. – Rahul May 8 '16 at 18:24
    
i am uncomfortable downloading and installing ubuntu2 files until i can establish why the files are not available through the command line(terminal). i have limited experience extracting and installing from a download. – paul May 8 '16 at 18:34

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