HNORIGIN · SOLVE

Troubleshooting

Systematic investigations of real infrastructure problems: what was observed, what the evidence showed, what fixed it, and how to stop it happening again.

The method

Every guide follows the same eight steps

You can check the reasoning at each step instead of copying commands blindly. Destructive commands are always clearly marked.

SymptomWhat is observed
EvidenceLogs, metrics, state
CausesHypotheses
TestsProve or rule out
FindingConfirmed cause
ResolutionSafe fix
VerificationConfirm recovery
PreventionStop the repeat

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Pick your domain

/linuxLinuxDisk, CPU, memory, services, networking /windowsWindowsServices, events, updates, AD /networkingNetworkingConnectivity, DNS, routing, firewalls /storageStorageCapacity, latency, SAN and NAS /backupBackupFailed jobs, restores, retention /vmwareVMwareHosts, VMs, vCenter, connectivity

Latest troubleshooting

Recent investigations

The first troubleshooting guides are being tested before publishing. Each one is validated on real systems, with no invented logs or output.

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