system-level exploration and troubleshooting tool

 Sysdig instruments your physical and virtual machines at the OS level by
 installing into the Linux kernel and capturing system calls and other OS
 events. Then, using sysdig's command line interface, you can filter and
 decode these events in order to extract useful information.
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 Sysdig can be used to inspect systems live in real-time, or to generate
 trace files that can be analyzed at a later stage.