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

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

Recover Lost Changes After Git Detached HEAD

You've made several edits, then checked out an old commit or tag, and now Git says you're...

Fix Virtual Environment Not Activating in Terminal

Why Your Virtual Environment Won't Activate

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

Fix pip Externally Managed Environment Error with pipx

If you're on a modern Linux distribution (like Ubuntu 23.04+, Fedora 38+, or Debian 12+) and ...

How to Fix "docker context canceled" on Mac

If you're seeing "context canceled" errors when running Docker commands on your Mac, ...

Fix Nginx Configuration Test: Missing Semicolon Error

When running nginx -t to test your configuration, you might see an error like: