papanda925

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.
2026.09.10
Microsoft 365 / Azure
PowerShell

Observing Win32 Window Handles with PowerShell

Read MainWindowHandle of a GUI process from PowerShell and observe the Win32 HWND.
2026.09.10
PowerShell
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.
2026.09.10
Networking / RFC
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.
2026.09.10
PowerShell
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.
2026.09.10
Linux / CLI / DevOps
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.
2026.09.10
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.
2026.09.10
PowerShell
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.
2026.09.09
Linux / CLI / DevOps
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.
2026.09.09
VBA / Office
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.
2026.09.09
PowerShell
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