It is available with almost every Linux distro and increasingly in cross-distro packages.
Install KDE software page lists tools to use to install the software on many distros.
AppImages allows you as user to get the latest version (or any version) of the software you need directly from its author and run it on your GNU/Linux distribution (almost any distribution). You only have to download the AppImage file, make it executable and run it.
KDE apps with AppImages:
You can find latest stable releases of many KDE software on Flathub.
You can find some information on nightly builds and how to develop targetting flatpak at Guidelines_and_HOWTOs/Flatpak.
The Snap Store has packages of many KDE applications which run on any Linux distro.
Beta releases are available in the [kde-unstable] repository.
AOSC OS provides the newest KDE Applications, Frameworks and Plasma packages in its main repository (pre-configured for official releases). Users can get updates to the newest KDE Plasma and KF5 components as soon as they are made public.
Users can also get newest pre-configured KDE releases from the AOSC OS release directory.
Plasma 5 packages are provided as part of the main Debian repository. The current stable release, Debian 9, codename Stretch, provides Plasma 5.8 and Applications 16.08. More recent versions are available in Debian's Unstable and Testing repositories. Plasma can be installed during initial Debian installation by selecting task-kde-desktop in the installer or installed in an existing Debian system by installing the kde-standard package.
We currently provide Plasma 5 packages (usually the latest stable release) in the kde repository. They can easily be installed with the help of the plasma set:
# cave resolve plasma*
We also offer packages for beta releases or packages tracking master, but you'll need to unmask them:
# echo 'plasma pre-release' >> /etc/paludis/package_unmask.conf
# echo 'plasma scm' >> /etc/paludis/package_unmask.conf
Supported Fedora releases get Plasma updates as soon as possible. Keep your Fedora installation updated and you are good to go.
See https://apps.fedoraproject.org/packages/plasma-workspace for details on the progress of Plasma updates.
The latest Plasma, Applications and Frameworks release ebuilds are available in the main repository keyworded ~amd64 and ~x86, with Plasma also available for ~arm and ~arm64. Gentoo usually stabilises the last stable release of each Plasma and Applications series on amd64 and x86, with Frameworks as needed. See the Gentoo wiki KDE article for general information.
Live source (stable and master branches) ebuilds for Plasma, Applications and Frameworks are available in the supplemental KDE development ebuild repository.
Plasma 5 is the default option and all installs automatically run the latest Plasma 5 release. Regularly updated ISO images are available on the Download Page
KDE neon builds all the latest KDE software
Kubuntu 18.04 LTS was released in April 2018 with Plasma 5.12.4 LTS. Plasma 5.12.5 is already available in updates PPA and Plasma 5.12.7 can be installed via the Kubuntu backports PPA. 18.04 will be supported until April 2021.
Kubuntu KCI provides the latest from KDE git. Add ppa:kubuntu-ci/unstable for testing. WARNING: Do not use on production systems. Ensure that you have ppa-purge installed in case you must roll back to your previous state. Zero guarantees that will fix a broken system.
Mageia Cauldron is updated to new Qt, KDE Frameworks, Plasma Desktop and KDE Applications release almost as soon as they're released.
OpenMandriva Cooker is updated to new Qt, KDE Frameworks, Plasma Desktop and KDE Applications releases as soon as they're released.
The latest OpenMandriva release version gets backports of new KDE software after it has been tested in Cooker for a while, and is usually a few weeks behind Cooker in updating.
Plasma Desktop is the default desktop in OpenMandriva. You do not need to run any extra commands to install it.
openSUSE Tumbleweed is a rolling release distribution and so the latest KDE software is directly available after release and openQA testing. Just keep your system up-to-date.
openSUSE Leap is focused on stability, so does not continuously update the software to later releases. For each release of Leap, the latest stable (LTS, if available) version of software is picked (Leap 42.2/42.3: Plasma 5.8 and Leap 15.x: Plasma 5.12). Bugfixes and other backports arrive as patch packages.
By adding additional repositories maintained by the KDE packaging team you can get the latest beta/rc/stable releases and git master builds of Applications, Plasma and other software on both Leap and Tumbleweed.
As well as Linux our software also work on other Unixes.
You can get a modern KDE Desktop by installing one of the following meta-ports depending on how much you want:
Install Plasma5 meta-port
# pkg install plasma5-plasma
Install Plasma5 and KDE Applications
# pkg install kde5
Alternatively you can point your desired ports builder at