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

Nginx 502 Bad Gateway: A Practical Troubleshooting Guide

Seeing a 502 Bad Gateway from Nginx usually means the upstream server (like PHP-FPM, uWSGI, or a ...

Chrome Access Denied on Specific Websites: Fixes That Work

You try to visit a site you’ve used before, but Chrome shows “Access Denied” or “403 Forbidden.” ...

How to Fix PowerShell Token Expired in Pipeline

When running PowerShell scripts in a CI/CD pipeline (Azure DevOps, GitHub Actions, Jenkins), you ...

How to Set Up OneDrive Sync After a 502 Bad Gateway Error

If you see a 502 Bad Gateway error while trying to set up OneDrive sync, it usually means somethi...

Fix 'Putty Connection Refused' Error on Localhost

When you try to connect to localhost with Putty and get 'connection refused', it usually means th...

Fix Command Prompt Not Recognizing Commands