Checklists for software errors, setup, and tool workflows.

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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...

Fix Docker Compose Environment Variable Not Set on Build

You've defined environment variables in your docker-compose.yml under envi...

Fix ERR_CERT_AUTHORITY_INVALID on Localhost
When testing a local web app, you may see ERR_CERT_AUTHORITY_INVALID in Chrome or si...

How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...

Fix Windows 11 No Internet but Wi-Fi Connected DNS Issue
You see the Wi-Fi icon connected with full bars, but apps, browsers, and system updates all repor...

Git Merge --allow-unrelated-histories: When and How to Use It
You run git merge and get an error: fatal: refusing to merge unrelated histories...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git Authentication Failed in VS Code on Linux

Fix Docker Compose Environment Variable Not Set on Build

Fix ERR_CERT_AUTHORITY_INVALID on Localhost

How to Fix Nginx Upstream Connection Refused on Port 80

Fix Windows 11 No Internet but Wi-Fi Connected DNS Issue

Git Merge --allow-unrelated-histories: When and How to Use It

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