Running Sinatra on port 80

Question

I installed Sinatra and it works but it uses port 4567 by default. I want it to run on port 80.

In an effort to get it to work on port 80, I tried this:

Answer 1

Can't you just use (http://www.sinatrarb.com/configuration.html):

set :port, 80

Note that in order to bind a socket to port 80, you'll need to have superuser privileges.

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And, by the way,

Using Sinatra.default_options to set base configuration items is obsolete

From: http://www.sinatrarb.com/one-oh-faq