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Ruby Installing a Ruby Development Environment Installing a Ruby Development Environment Installing the Treehouse VM on Mac

Posted by Johanne Trippas
Johanne Trippas
7,367 Points

Vagrant up

Hi, my installation of Ruby hasn't gone very well. Now I am getting the following message with the 'vagrant up' command.

$ vagrant up Bringing machine 'default' up with 'virtualbox' provider... Vagrant cannot forward the specified ports on this VM, since they would collide with some other application that is already listening on these ports. The forwarded port to 3000 is already in use on the host machine.

To fix this, modify your current projects Vagrantfile to use another port. Example, where '1234' would be replaced by a unique host port:

config.vm.network :forwarded_port, guest: 3000, host: 1234

Sometimes, Vagrant will attempt to auto-correct this for you. In this case, Vagrant was unable to. This is usually because the guest machine is in a state which doesn't allow modifying port forwarding.

Any ideas what I should do?

Thanks!

2 Answers

Johanne Trippas
Johanne Trippas
7,367 Points

I don't know if it has anything to do with it, but I closed and opened my terminal window and now it seems all fine.

James Barnett
James Barnett
39,199 Points
James Barnett
James Barnett
39,199 Points

You might have another application open that's using port 3000. The command lsof -i | grep LISTEN might tell you which one, and you can kill it. A restart might clear the port too.

In the worst case, you can go into the Vagrantfile and change the line config.vm.forward_port 3000, 3000 to config.vm.forward_port 3000, 3001 and load the page at http://localhost:3001 instead.

quoted from: http://d.ucsd.edu/class/intro-hci/lab/lab1/lab2_prep.html

Jacob Smith
Jacob Smith
10,926 Points
Jacob Smith
Jacob Smith
10,926 Points

I was having the same issue! This should be the best answer on this thread.