below is an interactive tool to view and record historical system data. It has support for: - information regarding hardware resource utilization - viewing the cgroup hierarchy - cgroup and process information - pressure stall information - record mode to record system data - replay mode to replay historical system data - live mode to view live system data - dump subcommand to report script-friendly information below does not have support for cgroup1. The name "below" stems from the fact that the below developers rejected many of atop's design and style decisions.