PowerShell Base64 Is Not Encryption: Visually Confirming Reversibility with PowerShell
Encode and decode Base64 in PowerShell to visually understand the difference between encoding and encryption.
PowerShell 
Programming / Web Development Understanding through Manga! Trying Out a Page-Switching Manga Viewer with Image Data: Landscape 4-Page Version and Smartphone Vertical-Scrolling Version
Using 4 Papanda manga images and JSON, we compare mechanisms by creating a landscape viewer that switches back and forth using JavaScript and a vertical-reading version for smartphones that stacks the same images vertically.
Microsoft 365 / Azure Cannot Verify Registered TXT Record in Microsoft 365: Troubleshooting DNS, TTL, and Authoritative Servers with PowerShell
When Microsoft 365 TXT verification fails, systematically troubleshoot authoritative DNS, recursive DNS, TTL, and configuration values using PowerShell.
PowerShell Observing Win32 Window Handles with PowerShell
Read MainWindowHandle of a GUI process from PowerShell and observe the Win32 HWND.
Networking / RFC Observing that TCP lacks message boundaries on localhost
Safely observe how the number of sends and the boundaries of receives do not match in TCP transmission and reception on localhost.
PowerShell Inspecting PowerShell for Dangerous Paths and Oversized Extractions Before Expanding ZIP Files
Before expanding a ZIP file, use PowerShell to inspect paths that extend outside the destination directory, total size, file count, and unexpected extensions.
Linux / CLI / DevOps Changing umask on Ubuntu and verifying how new file permissions change
Compare umask 022 and 077 in a temporary directory and observe how new file permissions are determined.
Networking / RFC Checking Redirect Paths and Final URLs with curl: Tracking 301 and 302
Use curl options such as -I, -L, and url_effective to isolate and verify 301/302 Location headers, intermediate paths, and final URLs.
PowerShell Consolidating duplicate FileSystemWatcher events in PowerShell: Trying out debounce
This article explains how to observe duplicate Changed events occurring in a short time with FileSystemWatcher and use debounce to consolidate subsequent processing into a single execution.
Linux / CLI / DevOps What is a Unix socket? Creating a temporary .sock file and observing how it differs from TCP ports
Safely create a temporary Unix domain socket in /tmp and observe how the path acts as an endpoint for communication on the same host. This also helps in understanding PHP-FPM .sock files.