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Infrastructure & Ops Hub¶

A systematic collection of infrastructure and system administration resources.

Linux Proxy Config
Complete proxy setup covering curl, wget, Docker, and yum - Firewall Comparison
firewalld vs iptables vs nftables — choosing the right tool - Claude Code + cron
Automate Claude Code with cron: setup and operations - SSE Timeout Fix
Stabilize SSE connections on Cloudflare + ALB

Guides by category¶

CI/CD & GitHub Actions¶

Optimize and secure your GitHub Actions workflows

Matrix Build Optimization — Reduce build times with matrix strategies
Matrix Design Deep Dive — Dynamic matrices and conditional logic
Self-hosted Runner Optimization — Cut costs and boost performance
Ephemeral Runner Security — Minimize attack surface with disposable runners

systemd Service Management¶

Linux service management and boot performance

systemd Service Management Guide — Writing and managing unit files
systemd-analyze Performance Deep Dive — Identify boot time bottlenecks
systemd Production Service Patterns — Production-ready configuration templates

Firewall & Security¶

Network security fundamentals

Firewall Comparison — Choosing between firewalld / iptables / nftables
firewalld Setup — Zone-based firewall management
iptables Setup — Adding, saving, and persisting rules
SELinux — Security policy management

Automation & Scheduling¶

Periodic tasks and workflow automation

Claude Code + Cron Automation — Schedule AI agent tasks
crontab Guide — Cron expressions and practical patterns
Ansible Roles Reference — importrole vs includerole

Cloud Infrastructure¶

Cloud architecture and configuration

SSE Timeout Mitigation Guide — Cloudflare + ALB environments

Disk & Network¶

Storage and network configuration

Disk Addition Notes — Adding new disks step by step
Static Routing (Ubuntu 16.04) — Network routing setup

Package Management¶

Software installation and maintenance

Linux Proxy Configuration Guide — curl, wget, Docker, yum support
Python Installation — Setting up a Python environment
yum Command Reference — Practical yum examples
RedHat/CentOS yum Setup — Repository config and initial setup

System Basics & Commands¶

From OS detection to text processing

OS Detection — Retrieving system information
DNS Setup — Network name resolution configuration
sed Command Reference — Practical text processing

Programming — Development-related technical information
Tools & Tips — Dev productivity tricks

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