How to start Meteor on different port

By default, Meteor app start on port 3000

$ meteor
[[[[[ ~/path-to/meteor/hello ]]]]]
=> Started proxy.                             
=> Started MongoDB.                           
=> Started your app.                          
=> App running at: http://localhost:3000/

1. Meteor Port 9999

To start Meteor app on a different port, start Meteor with --port parameter.

$ meteor --port 9999
[[[[[ ~/path-to/meteor/app ]]]]]
=> Started proxy.                             
=> Started MongoDB.                           
=> Started your app.                          
=> App running at: http://localhost:9999/

2. Meteor Port 80

For port lower than 1024, need sudo

$ meteor --port 80
Error: listen EACCES   
$ sudo meteor --port 80
[[[[[ ~/path-to/meteor/app ]]]]]
=> Started proxy.                             
=> Started MongoDB.                           
=> Started your app.                          
=> App running at: http://localhost:80/