Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

View list

Fixing Nginx 404 Errors for API Endpoints

When your API returns a 404 error from Nginx but works locally, the problem is usually in the Ngi...

Fix 'ffmpeg command not found' in PHP exec()

When you call exec('ffmpeg ...') in PHP and get ffmpeg command not found

Fix PuTTY Connection Refused: Check SSH Service
When you see 'Connection refused' in PuTTY, it usually means the SSH server on the remote machine...

Fix Windows Defender Service Not Starting (Connection Refused)
When you see 'Windows Defender service not starting – connection refused', it usually means the s...

GitHub Actions YAML Syntax Error: How to Fix
You push a workflow file and see a red X—YAML syntax error. The action doesn't run. Here's how to...

Fix Task Scheduler Error 101: Failed to Start
You see Event ID 101 in the Windows Event Viewer under TaskScheduler, and the task didn't run. Th...

Checklists for software errors, setup, and tool workflows.

Latest checklists

Fixing Nginx 404 Errors for API Endpoints

Fix 'ffmpeg command not found' in PHP exec()

Fix PuTTY Connection Refused: Check SSH Service

Fix Windows Defender Service Not Starting (Connection Refused)

GitHub Actions YAML Syntax Error: How to Fix

Fix Task Scheduler Error 101: Failed to Start

`Topic paths`

`Quick titles`