LESS GUESSING. BETTER QUESTIONS.
Get beneath
the symptom.
Something happened inside Linux.
Learn to find the evidence—and know where it ends.
For Linux practitioners learning to investigate with eBPF.
One attempt. Two boundaries.
The kernel program joins entry and exit by thread ID.
The same pathname can appear in successful and failed attempts.
Form a hypothesis
Decide what would change your mind.
Interrogate the evidence
Run a controlled incident. Inspect real output.
Defend your conclusion
Explain what follows—and what does not.
SEVEN INVESTIGATIONS
Different incidents.
A sharper way to think.
Process execution
Distinguish an execution attempt from its outcome.
File access
Use return evidence to separate missing files from denied access.
Connect failures
Locate the boundary of a failed connection.
DNS latency
Measure an interval without inventing its cause.
TCP retransmits
Compare retransmissions within a specific flow.
Namespace identity
Resolve apparently contradictory process identities.
Verifier boundaries
Separate verifier rejection from runtime observation.