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

How to Fix Git Detached HEAD State and Undo Changes

You run git status and see something like "HEAD detached at abc123". This ha...

Fix Node Sass Build Failure After npm Cache Clean

Fixing Cloudflare 521 Error After Server Restart

You restart your server, wait for it to come back up, then visit your site—only to see a Cloudfla...

Fix VSCode Intellisense Slow or Lagging: Practical Steps

If you notice IntelliSense suggestions appearing with a noticeable delay, or the editor freezes b...

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...

Nginx Configuration Test Failed: Fix Server Block Errors

When you run nginx -t and see "test failed" with a server block error, it us...