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

How to Clear SSH Known Hosts and Fix Host Key Verification Failed

Fix Windows Update Cleanup Stuck Waiting for Other Updates

If you're running Disk Cleanup and it hangs at 'Windows Update Cleanup' with a message that it is...

Fix Windows Defender Version Mismatch Permission Denied Error

You might see a 'version mismatch' or 'permission denied' error when trying to update or run Wind...

Fix Windows Search Port 80 Already in Use Error

You’re trying to start Windows Search or an indexing service, and you see an error like “Port 80 ...

How to Fix Nginx 502 Bad Gateway: A Practical Guide

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

PowerShell on Ubuntu 22.04: Setup Checklist

If you're setting up PowerShell on Ubuntu 22.04, you might hit errors like 'command not found' or...