Checklists for software errors, setup, and tool workflows.

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Fix Git 'index.lock file exists' Error

When you see the error fatal: Unable to create 'path/.git/index.lock': File exists....

Chrome Extensions Not Loading: Quick Fixes
You open Chrome, click the extensions icon, and nothing appears—or your extensions are grayed out...

Fix VS Code Git Authentication Failed with Two-Factor Auth
When you have two-factor authentication (2FA) enabled on your Git service (GitHub, GitLab, Bitbuc...

Cloudflare Origin Certificate Setup for Apache
If you use Cloudflare's proxy (orange cloud), you can set up an origin certificate to encrypt...

DNS Probe Finished NXDOMAIN: Meaning and Fixes
You're trying to visit a website but Chrome shows "DNS_PROBE_FINISHED_NXDOMAIN". This...

Fix Ethernet Connected but No Internet on Windows 11
You plug in an Ethernet cable, Windows 11 shows you're connected, but websites won't load...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fix Git 'index.lock file exists' Error

Chrome Extensions Not Loading: Quick Fixes

Fix VS Code Git Authentication Failed with Two-Factor Auth

Cloudflare Origin Certificate Setup for Apache

DNS Probe Finished NXDOMAIN: Meaning and Fixes

Fix Ethernet Connected but No Internet on Windows 11

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