# Nginx Port 80 Conflict

## Problem

Docker nginx container would not start.

### Error

```bash
failed to bind host port 0.0.0.0:80
```

## Cause

Ubuntu nginx service was already using port 80.

## Fix

Check what is using port 80:

```bash
ss -tulpn | grep :80
```

Stop nginx:

```bash
systemctl stop nginx
```

Disable nginx:

```bash
systemctl disable nginx
```

Remove nginx:

```bash
apt remove nginx nginx-common -y
```

Try the Docker container again.

```bash
docker run -d --name nginx -p 80:80 nginx
```

## Result

The Docker nginx container started successfully and was able to bind to port 80.