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wasp256
Asked: 2016-06-29 12:57:05 +0800 CST

Ubuntu doesn't show any updates anymore

  • 772

I have installed Ubuntu 16.04 in April, but since I have barely received any system updates (the ones popping up automatically with the Software Updater). When checking the kernel version with uname -r I get 4.4.0-21-generic which according to this list here seems pretty out of date.

By trying to run an update manually with apt upgrade and apt update I receive:

sudo apt upgrade 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  hostapd
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.

sudo apt update
Hit:1 http://ftp.lysator.liu.se/ubuntu xenial InRelease
Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease                                                                    
Hit:3 http://dl.google.com/linux/chrome/deb stable Release                                                                      
Hit:4 http://archive.canonical.com/ubuntu xenial InRelease                          
Hit:5 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu xenial InRelease         
Reading package lists... Done                                                 
Building dependency tree       
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.

sudo apt list --upgradable
Listing... Done
hostapd/xenial 1:2.4-0ubuntu6 amd64 [upgradable from: 1:1.0-3ubuntu2.1]
N: There is 1 additional version. Please use the '-a' switch to see it

Are there really any updates to install or is my system not finding them anymore?

apt

3 Answers

  1. Best Answer

    You have quite a serious problem. The only official update server on your system seems to be the archive.canonical.com. All other servers listed above have been placed there manually after the inital system installation.

    The missing update server's name should be <country-code>.archive.ubuntu.com (for example us.archive.ubuntu.com) and it's not there.

    You can try reconstructing /etc/apt/sources.list by following the instructions here for example or you can re-install your system. There are several other places all over the internet where you can find similar instructions on how to reconstruct sources.list.

    • 2

  2. Repositories not configured

    Your Ubuntu repositories are not configured correctly.

    1. Add some repository executing the command below:

      sudo apt-add-repository "deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted"

    2. Now, try updating:

      sudo apt-get update

    3. Upgrade:

      sudo apt-get upgrade
    • 0

  3. I Was looking for this and here is the solution.

    sudo apt full-upgrade

    I'm on POP Os.

    • 0