Workflow manuals for setup steps, repeatable tasks, and software operations.

Fix 'git pull failed index.lock file exists' Error

When running git pull, you may see an error like:

fatal: Unable to create &#...

Fixing Python Memory Errors with Large Files: Alternative Libraries

You're reading data from a large file—maybe a CSV, JSON, or Parquet—and Python crashes with a...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

How to Fix a Detached HEAD in Git Using SourceTree

If you open SourceTree and see a message like “You are in ‘detached HEAD’ state,” it means your w...

Checklist for Fixing Shared Folder Access in Windows

When you can't access a shared folder on Windows, the problem usually comes down to permissio...

Docker Container Exits Immediately: 'Command Not Found' Fix

You start a Docker container and it exits immediately with a message like /bin/sh: 1: somec...