Knowledge base for software setup, errors, and daily tool work.

Fix DNS Probe Finished NXDOMAIN Not Working on WiFi

If you see "DNS_PROBE_FINISHED_NXDOMAIN" in Chrome while connected to WiFi, your browser ...

Fix Git Authentication Failed in VS Code on Linux

You're working in VS Code on Linux, try to push or pull, and get a popup: "Git authentica...

How to Fix Windows Cannot Access Shared Folder

You try to open a shared folder on another PC and get 'Windows cannot access \\computer\share...

Fix Virtual Environment Not Activating in Terminal

Why Your Virtual Environment Won't Activate

You open a terminal, navigate to your pro...

Nginx Upstream Connection Refused: Diagnosis and Fixes

When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...

Node.js Garbage Collection Tuning to Avoid Heap Out of Memory

If your Node.js process crashes with a FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed -...