Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

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

You try to install or run a package and get an error like package requires a different Node...

Fix Nginx 502 Bad Gateway in Docker Containers
An Nginx 502 Bad Gateway error when proxying to a Docker container usually means Nginx cannot rea...

Resolving Git Merge Conflicts in Binary Files
You're merging branches and Git reports a conflict in a binary file. Unlike text files, you c...

How to Fix Git Index Lock File Exists Error
If you see an error like fatal: Unable to create 'path/to/repo/.git/index.lock': Fi...

Git Clone Connection Timed Out: Troubleshooting Checklist
When you run git clone and get a connection timed out error, the cl...