The KXStudio repositories support all Debian versions since Jessie and Ubuntu 14.04 or above.
They should work on all Debian-based distributions and variants, but the way to enable them will differ.
After the repositories are enabled and the system updated, we recommend you to install the "kxstudio-default-settings" package.

You might also want to check:

Below is information on how to enable the repositories.

Debian / Ubuntu

All Debian and Ubuntu users can enable our repositories by installing this deb file: kxstudio-repos.deb.
You can install it manually by running this:

# Install required dependencies if needed
sudo apt-get install apt-transport-https software-properties-common wget

# Download package file
wget https://launchpad.net/~kxstudio-debian/+archive/kxstudio/+files/kxstudio-repos_9.4.1~kxstudio1_all.deb

# Install it
sudo dpkg -i kxstudio-repos_9.4.1~kxstudio1_all.deb

If you're using a system newer or equal to Debian Testing or Ubuntu 15.10 you'll also need to enable GCC5 packages.
You can do so by installing this deb file - kxstudio-repos-gcc5.deb, or manually by running this:

# Install required dependencies if needed
sudo apt-get install libglibmm-2.4-1v5

# Download package file
wget https://launchpad.net/~kxstudio-debian/+archive/kxstudio/+files/kxstudio-repos-gcc5_9.4.1~kxstudio1_all.deb

# Install it
sudo dpkg -i kxstudio-repos-gcc5_9.4.1~kxstudio1_all.deb

These packages contain:

Various sources files that activates the separate repositories
GPG keys used for package and repository signing
A post-install script that enables an extra, Ubuntu-specific repository

NOTE:
Please do not copy these instructions to your own website, wiki, etc.
The packages file link might change at anytime, and so the instructions themselves.
Always refer to this exact page for how-to enable the KXStudio repositories please.