Checklists for software errors, setup, and tool workflows.

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Latest checklists

You're in the middle of a git merge, and instead of the usual conflict markers, you see

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

How to Fix 'fatal: refusing to merge unrelated histories' in Git
If you see fatal: refusing to merge unrelated histories when running git merge...

Firefox Secure Connection Failed: Date and Time Fix
If you see a 'Secure Connection Failed' error in Firefox that mentions date or time, it u...

Fix 'Git Remote Origin Already Exists' Without Deleting
When you run git remote add origin <url> and see fatal: remote origin al...

Fix Cloudflare 521 Error Due to Server Overload
You see a Cloudflare 521 error page. The message says the web server is down. Often, this means y...