from : http://scie.nti.st/2006/12/15/daemonize-a-ruby-process
Here's a neat thing I found. I needed a small bit of Ruby code to run continuously in the background, but because of how Capistrano can't seem to work well with "nohup" and "&" (background job), my ruby script itself needed to be able to fork and detach from the terminal. Here's how you do it:
#!/usr/bin/ruby pid = fork do Signal.trap('HUP', 'IGNORE') # Don't die upon logout loop do // Some code sleep 60 end end Process.detach(pid)