[Rails] Why 'rails server' is not working ?

Ruby on Rails Saturday, January 24, 2015

Hi, I'm trying to make a 'HelloWorld App', but i'm stopped with this problem, after typed 'rails server' i get this message:

"$: ~/TRAINING/Ruby/hello/hello_app$ rails server

bin/rails:6: warning: already initialized constant APP_PATH

/home/juanjo/TRAINING/Ruby/hello/hello_app/bin/rails:6: warning: previous definition of APP_PATH was here

Usage: rails COMMAND [ARGS]

The most common rails commands are:

generate Generate new code (short-cut alias: "g")

console Start the Rails console (short-cut alias: "c")

server Start the Rails server (short-cut alias: "s")

dbconsole Start a console for the database specified in config/database.yml

(short-cut alias: "db")

new Create a new Rails application. "rails new my_app" creates a

new application called MyApp in "./my_app"

In addition to those, there are:

destroy Undo code generated with "generate" (short-cut alias: "d")

plugin new Generates skeleton for developing a Rails plugin

runner Run a piece of code in the application environment (short-cut alias: "r")

All commands can be run with -h (or --help) for more information. "

what is the problem ? why can't start rails server?

Thanks.

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