Checklists for software errors, setup, and tool workflows.

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

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

fatal: Unable to create &#...

VS Code Source Control Not Detecting Changes on Mac: Fixes

You make edits in VS Code on your Mac, but the Source Control panel shows nothing. No files appea...

Docker Container Exits Immediately After Start: Network Fixes

You start a Docker container and it exits right away. The container logs show no errors, or the e...

Fix 'git remote origin already exists' Error in GitLab

When you try to add a GitLab remote to an existing Git repository, you might see the error:

How to Fix a Detached HEAD with Git Reset --hard

You're working in Git, and suddenly you see a warning: You are in 'detached HEAD...