Linux / CLI / DevOps

Comparing JSON Configurations with jq: Normalizing Key Order to Make Diffs Easier to Read

Learn how to use jq -S to normalize JSON key order before running diff, allowing you to focus on the actual configuration changes.
2026.09.14
Linux / CLI / DevOps
VBA / Office

Breaking down long formulas with the Excel LET function: How to verify intermediate results step by step

Try using the LET function to assign names to intermediate results and verify long Excel formulas one step at a time.
2026.09.14
VBA / Office
Microsoft 365 / Azure

How to Choose Between Microsoft 365 Copilot Chat and Copilot Business: Comparing the Free Tier and Paid Version for Business Operations

Compare Copilot Chat and Copilot Business not only by price, but also from the perspectives of in-app Office usage, business data integration, and role-based piloting.
2026.09.14
Microsoft 365 / Azure
IT News

Excel's =COPILOT function to be retired on September 14, 2026 — What to check right now

Based on official Microsoft announcements, we outline what to check in existing workbooks and how to evaluate alternatives before the Excel =COPILOT function is retired on September 14, 2026.
2026.09.13
IT News
Networking / RFC

Observing TCP States with PowerShell: What Do ESTABLISHED and TIME_WAIT Mean?

Use Get-NetTCPConnection to passively observe ESTABLISHED and TIME_WAIT states, bridging RFC 9293 TCP state transitions to practical troubleshooting.
2026.09.13
Networking / RFC
Networking / RFC

Checking HTTPS Certificate Expiration with PowerShell: Using .NET SslStream Directly

Establish a TLS connection from PowerShell using TcpClient and SslStream, and read-only check the Subject, NotAfter, and remaining days of the presented certificate.
2026.09.13
Networking / RFC
PowerShell

Verifying if Two Files Are Truly Identical: Using SHA-256 in PowerShell

Compare the SHA-256 hashes of two files using Get-FileHash in PowerShell, and safely observe the differences compared to file size checks and the drastic changes in the digest when a single character is modified.
2026.09.13
PowerShell
Microsoft 365 / Azure

What is the difference between Microsoft 365 Business Premium and E3? Choosing based on the 300-user limit, Windows, and management features

A practical comparison of Business Premium and Microsoft 365 E3 covering the 300-user limit, Windows Enterprise, management features, storage, and current pricing.
2026.09.13
Microsoft 365 / Azure
PowerShell

What is the Difference Between Win32, COM, and WinRT? Organizing the Three Windows API Worlds from PowerShell

We compare the entry points from PowerShell to Win32, COM, and WinRT, and organize how to distinguish them regarding naming, types, lifetime, and business automation usage.
2026.09.12
PowerShell
PowerShell

[Advanced Tech TRY] Consolidating Duplicate FileSystemWatcher Events: Visualizing Debounce

Observe duplicate FileSystemWatcher events and design separate handling for debouncing, file readiness checks, idempotency, and missed events.
2026.09.12
PowerShell
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