Checklists for software errors, setup, and tool workflows.

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Fix npm run build Failed After Git Pull

You pulled the latest code from Git, ran npm run build, and got errors. This is a co...

Fix Cloudflare 522 Error by Disabling Proxy Temporarily

If you see a Cloudflare 522 error, it means Cloudflare tried to reach your origin server but the ...

Taskbar Icons Missing but Programs Running – Fix Guide

You start your computer, launch your usual apps, and the programs are running—you can see them in...

Fix Nginx 502 Bad Gateway on Docker Ubuntu

You're running Nginx as a reverse proxy inside Docker on Ubuntu, and suddenly you see

How to Fix the Git index.lock File Exists Error

You're in the middle of a Git operation—commit, merge, or rebase—and Git stops with: fa...

Fix 'Windows Cannot Access Shared Folder' Samba Error
You try to open a shared folder from a Linux Samba server on a Windows machine and get: 'Wind...