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

Fix Nginx Permission Denied on CentOS: A Practical Guide

You're setting up Nginx on CentOS and hitting a 'permission denied' error in the erro...

How to Create a New Branch from a Detached HEAD in Git

If you see a message like "You are in 'detached HEAD' state" in Git, it means you...

Git Merge Conflict Checklist Before Merging

You're about to merge a branch, but you've been burned by merge conflicts before. This ch...

Resolving Python Dependency Conflicts in pyproject.toml

You've updated a dependency in pyproject.toml, and now pip install ...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

Fix 'port already allocated' for Nginx in Docker Compose

You're starting your Docker Compose setup with Nginx, and you see "port is already alloca...