Rails: Permission denied - bind(2) for "127.0.0.1" port 3000 (Errno::EACCES)

I follow a tutorial on how to get started with rails, but end up with different outcome than the video. Here is the message I get back when using the command rails s:

C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:269:in `initialize': Permission denied - bind(2) for "127.0.0.1" port 3000 (Errno::EACCES)
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:269:in `new'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:269:in `add_tcp_listener'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:263:in `block in add_tcp_listener'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:262:in `each'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:262:in `add_tcp_listener'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:105:in `block in parse'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:88:in `each'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/binder.rb:88:in `parse'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/runner.rb:144:in `load_and_bind'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/single.rb:87:in `run'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/puma/launcher.rb:172:in `run'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/puma-3.8.2/lib/rack/handler/puma.rb:64:in `run'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/server.rb:296:in `start'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/commands/server.rb:79:in `start'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:90:in `block in server'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:85:in `tap'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:85:in `server'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
    from C:/RailsInstaller/Ruby2.3.0/lib/ruby/gems/2.3.0/gems/railties-5.0.2/lib/rails/commands.rb:18:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

EDIT: I am on Windows, and have tried running the command prompt as admin. Same result.

EDIT SOLVED:

technet.microsoft.com/en-us/library/ms345310(v=sql.100).aspx and restart your pc - Chetan Mehta

Solution

For ubuntu :

Try running sudo rails s Make sure you have sudo permissions

If the port is busy, you can try running server on a different port. i.e.:

rails s -p 3001

If you are using window then instead of sudo try running your command prompt as administrator