Checkmk
Next generation monitoring.
Software
Start by downloading the checkmk package from the checkmk https://checkmk.com/download?edition=cre&version=stable&dist=debian&os=buster
apt-get install gdebi
wget https://download.checkmk.com/checkmk/2.0.0/check-mk-raw-2.0.0_0.buster_amd64.deb dpkg -i check-mk-raw-2.0.0_0.buster_amd64.deb