📘 Cheat Sheets

Quick-reference materials, command summaries, and engineering guides — based on real-world fieldwork, not vendor marketing.

Topics

• aws-cli.md – Frequently used AWS CLI commands for EC2, S3, IAM, and CloudFront.
• sip-status-codes.md – Common SIP response codes and their meanings.
• voip-debug-tips.md – Field-proven techniques for diagnosing SIP/VoIP issues.

📝 Want to contribute a cheat sheet? Add your own .md or .pdf and submit a PR!