I’m trying to run an Nginx container on my server using the following command:
docker run -d -p 80:80 nginx
But I keep getting this error:
docker: Error response from daemon: driver failed programming external connectivity on endpoint <container_id>:
Bind for 0.0.0.0:80 failed: port is already allocated.
How can I find out what’s causing this and free up the port so I can run my container?
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Accepted Answer
Hi there,
That error means something is already using port 80 on your system. You can check which process is using it with:
sudo netstat -tulnp | grep :80
or
sudo lsof -i :80
If it’s Nginx or Apache, you can stop it:
sudo systemctl stop nginx
# or
sudo systemctl stop apache2
If you don’t want to stop the service, run your container on a different port, like this:
docker run -d -p 8080:80 nginx
Then access it at http://localhost:8080.
Let me know if you’re still stuck! 🚀
- Bobby
Often this happens when a web server like Apache is pre-installed and running on the system. Disabling it using sudo systemctl stop apache2 (or httpd, depending on the OS) usually solves the issue.
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