PORT 6006 / TCPDev & LocalhostExposure Risk: Low

Port 6006: Storybook / TensorBoard — Storybook UI Component Explorer & PyTorch/TF TensorBoard

Default port for Frontend Storybook (`npm run storybook`) and Machine Learning TensorBoard visualizations.

Default Service

Storybook / TensorBoard

Process: node / tensorboard

Transport Protocol

TCP

IANA Registered Port 6006

Docker Port Flag

-p 6006:6006

Container to Host Mapping

How to Check & Kill Process on Port 6006 (EADDRINUSE Fix)

macOS & Linux (lsof / kill)

# Find process using port 6006
sudo lsof -i :6006

# Instantly kill process on port 6006
lsof -ti:6006 | xargs kill -9

Windows (PowerShell & CMD)

# Find PID listening on port 6006
netstat -ano | findstr :6006

# Force kill by PID
taskkill /PID <PID_NUMBER> /F

Cross-Platform Node.js One-Liner

# Kill port 6006 via npx
npx kill-port 6006

# Or diagnose via Castov CLI
npx castov fix "EADDRINUSE :::6006"

Linux Firewall (UFW) & Connectivity Test

# Test if port 6006 is reachable
nc -zv localhost 6006

# Allow or deny port 6006 in UFW
sudo ufw allow 6006/tcp

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Frequently Asked Questions about Port 6006

What is Port 6006 used for?

Port 6006 is the standard network port for Storybook / TensorBoard (Storybook UI Component Explorer & PyTorch/TF TensorBoard) operating over TCP. The typical system daemon or process is node / tensorboard.

How do I kill a process running on Port 6006 (EADDRINUSE)?

On macOS and Linux, run: lsof -ti:6006 | xargs kill -9 (or npx kill-port 6006). On Windows PowerShell/CMD, run: netstat -ano | findstr :6006 and then taskkill /PID <PID> /F.