syslog-ng 3.24 packages are available for Ubuntu 19.10
wget -qO - http://download.opensuse.org/repositories/home:/laszlo_budai:/syslog-ng/xUbuntu_19.10/Release.key | sudo apt-key add -
echo "deb http://download.opensuse.org/repositories/home:/laszlo_budai:/syslog-ng/xUbuntu_19.10 ./" | sudo tee /etc/apt/sources.list.d/syslog-ng-obs.list
sudo apt-get update
sudo apt-get install syslog-ng-core
regards,
Laszlo Budai
