apt -y install apt-transport-https wget gnupg
wget -O - https://packages.icinga.com/icinga.key | gpg --dearmor -o /usr/share/keyrings/icinga-archive-keyring.gpg
DIST=$(awk -F"[)(]+" '/VERSION=/ {print $2}' /etc/os-release); echo "deb [signed-by=/usr/share/keyrings/icinga-archive-keyring.gpg] https://packages.icinga.com/debian icinga-${DIST} main" >  /etc/apt/sources.list.d/${DIST}-icinga.list
apt update
apt install -y icinga2-bin icinga2-common icinga2