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.
Networking / RFC 
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.
VBA / Office Can you create custom events in VBA? Trying out Class, WithEvents, and RaiseEvent with minimal code
Observe a minimal event-driven setup where a custom event is declared in a VBA Class Module, raised with RaiseEvent, and handled with WithEvents.
PowerShell Modifying environment variables in PowerShell and verifying with the GUI: The differences between Process, User, and Machine
Manipulate dummy environment variables at the Process and User scopes, and compare the Windows environment variable GUI with the PowerShell display.
Programming / Web Development Retrieving a smartphone's current location in the browser and displaying it on a map: Running the Geolocation API + Leaflet
Pass the latitude and longitude obtained via the Geolocation API to Leaflet to display the current position on the map. Observe the division of roles between location acquisition and map rendering.
Microsoft 365 / Azure Are JWTs encrypted? — Reading the structure without real tokens in PowerShell
Create a complete dummy JWT-like dataset in PowerShell and safely observe header.payload.signature and Base64URL decoding.
Networking / RFC Trying IPv6 Communication with PowerShell — How is the localhost TCP of ::1 Different from IPv4?
Set up a TCP server and client on a single PC using the IPv6 loopback ::1, and observe the differences in endpoints and AddressFamilies.
PowerShell Calling WinRT Directly from PowerShell: Observing Windows Power States with PowerManager
A minimal smoke test to call WinRT's PowerManager directly from Windows PowerShell 5.1 and read remaining battery capacity and power supply status.
Linux / CLI / DevOps Checking “Who is listening on this port?” in Ubuntu — Linking sockets and processes with ss
Learn how to check TCP listening ports and their associated processes in Ubuntu using ss. We also break down how to read 127.0.0.1, 0.0.0.0, and [::], and how permissions affect process displays.