Rex Bytes

pgmonkey: One Config File to Rule All Your PostgreSQL Connections Summary: pgmonkey is a Python library that unifies PostgreSQL connection management (normal, pooled, async, and async-pooled) behind a single YAML…

Advanced Make - Libraries, Linking, and Mixed Builds Summary: Build static and shared libraries with Make, link against external libraries using pkg-config, create mixed-language projects, and understand the debian/rules Makefile…

Make as a Task Runner - Shell Scripts, Python, and Beyond Summary: Use GNU Make to automate workflows that have nothing to do with compiling code. You will build Makefiles…

Make for C and C++ - Compiling Real Projects Summary: Use GNU Make to compile C and C++ programs. You will learn the compilation pipeline, standard Make variables, pattern rules,…

Make Fundamentals - Targets, Prerequisites, and Recipes Summary: Learn what GNU Make is, how it works, and how to write your first Makefile. By the end you will understand targets,…

Your Manager's Spreadsheet Is Broken. Here's the 3-Minute Fix. Summary: How xlfilldown turns nightmare Excel files into clean, queryable data — without loading the whole thing into memory. You know…

WireGuard Kill Switch (IPv4): Block All Traffic If the VPN Drops Summary: Configure WireGuard with a kill switch that blocks all IPv4 internet traffic whenever the VPN tunnel is down,…

WireGuard Split Tunneling: Route Internet Through VPN, Keep Local Access Summary: Configure WireGuard to route all internet traffic through the VPN while keeping direct access to local network devices like…

WireGuard Client Setup on Ubuntu Summary: Install WireGuard on Ubuntu, generate keys, configure a VPN tunnel to a remote server, and verify the connection. KeyValueServer public IP203.0.113.10Client public IP198.51.100.50VPN subnet10.0.0.0/24Server…

Networking Basics for VPN Users Summary: A quick primer on IP addresses, public and private networks, subnet masks, CIDR notation, ports, and DNS — the concepts you need to follow…