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Can anyone tell how to upgrade Kubuntu 15 plasma to 5.4? I found these commands:

sudo add-apt-repository ppa:kubuntu-ppa/backports
sudo apt-get update && sudo apt-get dist-upgrade

But after restart I still have plasma 5.3. Even in Help -> About System Settings I see version 5.3.2. What else I need to do, to upgrade plasma version?

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  • welcome to askubuntu. try after you do this two steps, do a "sudo apt-get install kubuntu-desktop" without the ".
    – user433732
    Aug 26, 2015 at 19:22
  • After this command, I still have the same version.
    – DMG
    Aug 26, 2015 at 19:50
  • ops :D, so i have no idea now
    – user433732
    Aug 26, 2015 at 19:57

2 Answers 2

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Use this tuto:

  1. Add Kubuntu CI Stable PPA:

    sudo add-apt-repository ppa:kubuntu-ci/stable
    

    If you’ve added Kubuntu backports PPA, and it does not yet update with Plasma 5.4. You may remove it via:

    sudo add-apt-repository -r ppa:kubuntu-ppa/backports
    
  2. Update system cache and upgrade your system:

    sudo apt-get update
    sudo apt-get dist-upgrade
    

If you’re not in Kubuntu, you may run below command to install KDE:

sudo apt-get install plasma-desktop

If everything goes well, restart your computer to apply changes.

Source: ubuntuhandbook.org

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You can check Kubuntu Backports to see when plasma-desktop is upgraded to 5.4. Just search for plasma-desktop on the page.

You might also want to read How to Install KDE Plasma 5.4 in (K)Ubuntu 15.04, especially for the part on how to uninstall the backports ppa if anything goes wrong. I needed that in the past. ;)

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