Checklists for software errors, setup, and tool workflows.

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Docker Container Exits Immediately in Foreground Mode: Fixes

You run a Docker container with docker run -it myimage and it exits immediately. The...

Fix VSCode Permission Denied on Save in Linux

You're editing a file in Visual Studio Code, press Ctrl+S, and see a red error: "Failed t...

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 Nginx 502 Bad Gateway: Upstream Connection Refused

If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...

How to Fix Git Clone Timeout on Slow Internet

If you're seeing fatal: unable to access 'https://...' : Failed to connect ...:...

Fix VS Code Source Control Not Detecting Changes in Subfolder
You open VS Code, see changes in the root folder, but the Source Control panel shows nothing for ...