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DevOps & MLOps • Cyber Security • Data Engineering • Artificial Intelligence • Software Engineering Management

This repository is public engineering notebook. Just fixes, configs, failures, guides and working solutions. If something is here, it means it broke in real life and had to be solved properly.

Short, practical, directly applicable technical notes. Most of them are written right after solving production issues. No beginner tutorials. These are operator notes.

Who am I

I’m Datasins

• Software developer since 2005
• Director of Software Engineering
• Infrastructure, backend, and systems focused

GitHub • Insta • X • Website

Index

Devops

• LAMP Stack on Ubuntu: Apache, MySQL, PHP Multi-Version, VirtualHost, phpMyAdmin
• Hosting a Compiled Binary as a systemd Daemon (Rust, Go, C++)
• Git: Multiple Accounts & SSH Keys via ~/.ssh/config
• WireGuard VPN Server & Client Setup on AWS
• Git: Detached HEAD Recovery & Lost Commit Rescue
• VirtualBox: Installation, Extension Pack & Guest Additions on Ubuntu
• CyberPanel + SnappyMail: spam goes to Junk
• Rclone Backup to Google Drive: encrypted, cron, security

Programming

• PHP: MySQLi vs PDO - Secure CRUD Reference
• C++ Memory Management: Dynamic Allocation, Smart Pointers & Common Pitfalls

Security

• Nmap: Port Scanning & Network Reconnaissance Reference

OS

• FileZilla: Invisible Filenames & Text Glitch Fix on Ubuntu
• GRUB: Manually Adding Windows to Ubuntu Boot Menu

Others

• Code Syntax Highlight Test Page

Philosophy

Machiavellianism

Warning

These notes assume:

Linux familiarity • root access • production responsibility

They are not beginner guides.

License

MIT & Use at your own risk.

End

"Vibes scale confidence. Experience scales consequences."

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