Software troubleshooting desk

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

Symptom

Cause

Fix route

Verify

Fresh repair notes

All notes

Fix DNS Probe Finished NXDOMAIN After Changing DNS

After updating your DNS settings—perhaps to use Google Public DNS or Cloudflare—you might see the...

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM

You're seeing upstream connection refused in your Nginx error log, and your site...

Fix Node.js Heap Out of Memory When Processing Large JSON Files

If you're seeing FATAL ERROR: Ineffective mark-compacts near heap limit Allocation fail...

How to Manually Activate a Python Virtual Environment
You've created a Python virtual environment but can't get it to activate. This guide walk...

Fix Python Permission Denied When Installing Packages on Windows
You run pip install somepackage on Windows and get a PermissionError

Fix npm run build Syntax Error: Common Causes and Solutions
When you run npm run build and see a syntax error, the build process stops immediate...


    Issue queue
Sitemap
Handling Binary File Conflicts in Git Merge
Fix Chrome High RAM Usage from Hardware Acceleration
Remove Git index.lock File Manually
VSCode Permission Denied in Docker Container Fix
How to Fix Nginx 13 Permission Denied for www-data
Check Docker Disk Usage: Commands and Cleanup
Nginx Upstream Connection Refused: Quick Fix
How to Resolve ERR_NAME_NOT_RESOLVED in Chrome
Fix Windows Security App Missing from Start Menu
Troubleshoot Firefox Certificate Errors in Windows 10
Handling Missing Peer Dependencies in pnpm Install
Fix npm install Permission Denied Due to Incorrect Node Ownership
Desk note

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