Checklists for software errors, setup, and tool workflows.

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Fix Git SSL Certificate Error: Unable to Get Local Issuer Certificate

When cloning or pulling from a Git repository, you may see:

fatal: unable to access...

Fix Cloudflare DNS Propagation Not Happening for www
You updated DNS records for your www subdomain in Cloudflare, but hours (or days) later, the chan...

Fix Nginx 502 Bad Gateway with Docker Multiple Containers
If you run Nginx as a reverse proxy in front of multiple Docker containers, a 502 Bad Gateway err...

Fixing Windows Update Error 0x800f081f with DISM
Windows Update error 0x800f081f typically appears when the system cannot find or load a required ...

Fix Firefox Secure Connection Failed on Mac
If you see "Secure Connection Failed" in Firefox on your Mac, the browser is blocking the...

Fix Git Authentication Failed in VS Code on Linux
You're working in VS Code on Linux, try to push or pull, and get a popup: "Git authentica...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git SSL Certificate Error: Unable to Get Local Issuer Certificate

Fix Cloudflare DNS Propagation Not Happening for www

Fix Nginx 502 Bad Gateway with Docker Multiple Containers

Fixing Windows Update Error 0x800f081f with DISM

Fix Firefox Secure Connection Failed on Mac

Fix Git Authentication Failed in VS Code on Linux

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