Checklists for software errors, setup, and tool workflows.

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Fix 'Permission Denied' When Using mkdir in VS Code Terminal

You're working in the VS Code integrated terminal and run a mkdir command only t...

Fix Nginx Configuration Test Failure After Adding Proxy Pass

You add a proxy_pass directive to an Nginx server block, run nginx -t, ...

Git index.lock File Exists Even After Deleting: Fixes

You delete the .git/index.lock file, but Git still says it exists. This can happen d...

DNS Probe Finished NXDOMAIN: Meaning and Fixes

You're trying to visit a website but Chrome shows "DNS_PROBE_FINISHED_NXDOMAIN". This...

How to Fix Python Memory Errors When Reading Large CSV Files

If you've ever tried to load a CSV file that's several gigabytes into pandas with p...

Fix Git SSL Certificate Verify Failed: Unable to Get Local Issuer
When you see fatal: unable to access '...': SSL certificate problem: unable to get ...