deploy.rb

namespace :deploy do
  task :start do; end
  task :stop do; end
  
  desc "restart passenger server"
  task :restart, :roles => :app, :except => { :no_release => true } do
    run "#{try_sudo} touch #{File.join(current_path,'tmp','restart.txt')}"
  end
  
 desc "Update the crontab file"
 task :update_crontab, :roles => :db do
   run "cd #{release_path} && whenever --update-crontab #{application}"
 end
end

after "deploy:symlink", "deploy:update_crontab"