A service on a VM dies and restarts every few minutes, and the team has shrugged for weeks. Find the actual cause.

This one separates people who read journals from people who restart harder. The exit code and signal systemd already recorded usually name the disease.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

This one separates people who read journals from people who restart harder. The exit code and signal systemd already recorded usually name the disease.

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Next in this trackApps emit more log lines than the logging pipeline stores, and nothing alerts. Where do the missing events go?Next in this trackAfter moving a shared directory onto NFS, app threads pile into D state and load average tops 50 while CPUs sit idle. Explain it.Next in this trackAuth tokens verify on some replicas and fail on others, seemingly at random. Someone blames clock skew. Make the case.

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