Cheatsheets
Shorter paths through the details that matter in a terminal, manifest, or incident. Each cheatsheet is maintained as a living guide and links to the relevant tool and primary documentation.
kubernetes
kubectl cheatsheet (2026 edition)
A working kubectl reference for Kubernetes 1.36: output formats, JSONPath, debug workflows, server-side apply, drain safety, and the version skew rules.
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yaml-json
The YAML + JSON config reference
How YAML and JSON really differ, why YAML 1.1 versus 1.2 keeps breaking configs, and the type coercion traps that bite Kubernetes, Helm, and Ansible users.
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web-dev
Regex patterns you will actually use
A working regex reference: the syntax worth memorizing, patterns for logs, semver, URIs and email, flag semantics, dialect differences, and how to avoid ReDoS.
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web-dev
HTTP headers cheatsheet
A practical HTTP headers cheatsheet for requests, responses, caching, cookies, CORS, security policy, and the headers worth checking during an incident.
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tls-certs
OpenSSL commands cheatsheet for TLS work
The OpenSSL commands worth keeping for certificate inspection, CSRs, private keys, chains, fingerprints, expiry checks, and TLS handshake debugging.
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