Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When you try to install a package with pip on Python 3.11 and see the error error: external...

Fix 'Python Command Not Found' in Anaconda on Windows
If you installed Anaconda on Windows but typing python in Command Prompt returns

Fix Firefox Secure Connection Failed Due to Proxy Settings
If you see "Secure Connection Failed" in Firefox and suspect a proxy is involved, you'...

Fix err_name_not_resolved Caused by Chrome Extensions
If you see err_name_not_resolved in Chrome, a misbehaving or conflicting extension c...

Fix Git Pull Unrelated Histories Error: Step-by-Step
You run git pull and see: fatal: refusing to merge unrelated histories....

Git Push Rejected Non Fast Forward: How to Fix
You run git push and see: ! [rejected] main -> main (non-fast-forward)