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

SSH Permission Denied (Publickey) on EC2: Setup Fixes

If you're seeing "Permission denied (publickey)" when trying to SSH into an AWS EC2 instance, the...

Fix Laravel Artisan Command Not Found on Ubuntu

Fix Docker Login Access Denied for Registry Authentication

When you run docker login and get an access denied error, it usually me...

How to Fix Cloudflare DNS Not Resolving Error 1016

If you're seeing error 1016 when trying to reach a site behind Cloudflare, it means the DNS looku...

How to Repair Windows Search Using the Built-in Troubleshooter

Windows Search not returning results or indexing slowly? The built-in Search and Indexing trouble...

Certbot Nginx Plugin Install Failures: Common Fixes

When you run certbot --nginx and get an error like "The nginx plugin is not working"...