IT troubleshooting guides and tools

What broke?

Nine field guides and 80+ free tools for help desk, network, systems, security, cloud, healthcare IT, data and AI. Search a symptom, an error or a command.

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Start from a symptom

Device has no IP (DHCP)Network Ops Can't printHelp Desk Account keeps locking outSecurity User can't sign in to Microsoft 365Cloud Interface down or messages queuedHealthcare IT Server disk fullSystems Admin API returns 401 or 403Scripting & DevOps User reports a suspicious emailSecurity

Guides

Help Desk

Triage, accounts, PCs, printers, Outlook and Teams.

Ticket note builderUser message templatesError code lookup

Network Ops Analyst Field Guide

Switching, routing, wireless and fiber from the cable up, with a guided ticket mode.

25 analyzersMAC vendor lookupGuided ticket mode

Systems Admin

Active Directory, Group Policy, Windows Server and Linux.

Event ID lookupAD timestamp converterCron builder

Security

Threats, identity, detection and incident response.

Email header analyzerURL inspectorCertificate decoder

Cloud

AWS, Azure, Google Cloud and Microsoft 365, translated into each other.

Service translatorVPC plannerIAM policy explainer

Healthcare IT

HL7, FHIR, DICOM, clinical devices and downtime.

HL7 message parserACK builderDICOM tag lookup

Scripting & DevOps

Git, Python, PowerShell, Bash, APIs and containers.

Regex testerJSON / YAML / CSV converterJWT decoder

Data Science | Analytics | AI

Statistics, SQL, Python, R, machine learning and LLMs.

Dataset profilerPrompt builder15 tools

IT Career & Certs

Career paths and certifications for every area, with study plans and interview prep.

Practice quizzesStudy plannerCareer roadmap

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