Quick reference

Cheat Sheets

For the moment you are already in the incident and need the command, not the explanation. Each sheet is ordered the way you actually work through a problem — fastest checks first, and the metrics that mislead called out explicitly.

5 sheets

5 categories

270+ commands

Git

1 sheet

Git Recovery Cheat Sheet

Git

Undoing the commit, the push, the rebase and the reset — including how to recover work that looks permanently gone.

git version-control recovery cli

Kubernetes

1 sheet

kubectl Triage Cheat Sheet

Kubernetes

The commands you actually run during a Kubernetes incident, in the order you run them — from a Pending pod to a dead node to an empty Service.

kubernetes kubectl debugging incident

Linux System

1 sheet

Linux Performance Triage Cheat Sheet

Linux System

A repeatable 60-second triage for a slow or unresponsive host — CPU, memory, disk and process state — plus the metrics that routinely mislead.

linux performance debugging cli

Networking

1 sheet

Linux Network Diagnosis Cheat Sheet

Networking

Walk a network fault layer by layer — reachability, routing, ports, DNS, TLS and packet capture — and prove whether latency lives in the network or the application.

linux networking cli debugging

Shell Scripting

1 sheet

Bash Scripting Cheat Sheet

Shell Scripting

Quoting, expansion, strict mode, traps and the constructs that silently corrupt data — the reference for writing shell that survives production.

bash shell scripting cli