Software troubleshooting desk

Practical fixes for tool errors, setup blocks, and workflow issues.

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix Docker Nginx 502 Bad Gateway with MySQL

You have a Dockerized web app behind Nginx, and you're seeing a 502 Bad Gateway error. The ap...

Fix Nginx Configuration Test Failure on Location Directive

When you run nginx -t and see an error like [emerg] invalid location directive...

Cloudflare Wildcard Subdomain CNAME Setup Guide
If you need to route all subdomains (e.g., *.example.com) to the same target, a wildcard CNAME re...

Docker Container Exits Immediately on Linux: Fixes
You start a Docker container, but it exits immediately. This is a common issue on Linux. The cont...

How to Flush DNS on Windows 11 to Fix Internet Issues
If your internet seems slow, websites won't load, or you see DNS-related errors, a corrupted ...

Git index.lock File Exists: Quick Fix Checklist
You try to run a Git command and see fatal: Unable to create 'path/.git/index.lock'...


    Issue queue
Sitemap
Troubleshoot Windows 11 BSOD After Update Using SFC
Docker System DF No Space Left Error Fix
Fix ERR_NAME_NOT_RESOLVED on All Sites in Chrome
Docker Desktop Access Denied When Pulling Images
Git Merge Refusing Unrelated Histories Solution
Python Requests UnicodeDecodeError Troubleshooting Guide
Chrome Crashing on Startup? Here's How to Fix It
Git Detached HEAD Push to Remote Branch
Windows Update 0x80070002 After Update: Fixes
Troubleshooting ERR_NAME_NOT_RESOLVED on Windows 10
Resolve Git Push Rejected Error
Enable Docker Desktop to Start Automatically on Windows 11
Desk note

    Troubleshooting paths
Home
Windows FixesmacOS HelpBrowser IssuesOffice ToolsDeveloper ToolsCloud SoftwareSecurity ToolsBackup RecoveryNetwork ToolsDatabase ToolsAI ToolsProductivity AppsCLI ErrorsDocker KubernetesEmail ClientsFile Utilities