For KDE users want to install the latest Plasma 5.21.5 desktop, it’s now available in the backports PPA for (K)Ubuntu 21.04.

Plasma 5.21.5 was released more than a week ago with stability improvements and bug-fixes. As well as the KDE Frameworks 5.81.0, they are now available to install via Kubuntu Backports PPA.

Install Plasma 5.21.5 in (K)Ubuntu 21.04:

Search for and open a terminal emulator from start menu. When it opens, run following commands one by one.

1. Add the PPA.

To add the PPA repository, paste the command below and hit run:

sudo add-apt-repository ppa:kubuntu-ppa/backports

2. Install / Upgrade to Plasma 5.21.5:

For KUbuntu 21.04, simply run apt upgrade to install available upgrades of all packages.

sudo apt upgrade

If you’re going to install KDE Plasma in Ubuntu 21.04, run command:

sudo apt install kubuntu-desktop

There are a large list of packages to install. I’d recommend to take a screenshot of what packages to install, in case you want to remove KDE later.

Finally restart your machine to apply changes and enjoy!