Minimum System Requirements System Resource Requirements Just testing* Minimum server specification** CPU 2 GHz dual core x86_64 3 GHz quad core x86_64 and above RAM 4 GB (physical) 8 GB (physical) and above Storage (disk space) 20 GB HDD, SSD 100 GB with SSD and above *You can install the packages and the services will start up **We don’t take into account your intended workload, e.g. network size, number of monitored metrics, flows, events and data retention requirements. Operating Systems Make sure that your chosen operating system is listed in one of the following tables before you install OpenNMS Horizon. See the release notes for information about platform support changes, including deprecated platforms. Operating System Supported Versions (64-bit) RHEL 7.x 8.x CentOS 7.x 8.x Debian 9 - 10 Ubuntu 20.04 LTS Minion Installing Minion