Get the code

https://github.com/rthomsen/kcmsystemd.git

Get the prerequisites

sudo apt-get install libkf5i18n-dev libkf5configwidgets-dev libkf5coreaddons-dev libkf5service-dev

sudo apt-get install cmake extra-cmake-modules qt5-default libsystemd-dev

sudo apt-get libboost-dev libboost-filesystem-dev libboost-system-dev libboost-chrono-dev

Compile

cd kcmsystemd

mkdir build

cd build

cmake -DCMAKE_INSTALL_PREFIX=$(kf5-config --prefix) ..

make

sudo make install

Fix paths

sudo ln -s /usr/lib/x86_64-linux-gnu/plugins/kcm_systemd.so /usr/lib/x86_64-linux-gnu/qt5/plugins/

You could instead add /usr/lib/x86_64-linux-gnu/plugins/ to $QT_PLUGIN_PATH. Use

kcmshell5 kcm_systemd

or

systemsettings5

Then click on systemd