gistfile1.txt

role :cron,"ec2-175-41-222-1.ap-northeast-1.compute.amazonaws.com"

namespace :deploy do
 #deploy:restartタスク
 task :restart, :roles => :app do
  send(:run, "sudo /etc/init.d/apache2 restart")
 end

 #deploy:startタスク
 task :start, :roles => :app do
  send(run_method, "sudo /etc/init.d/apache2 restart")
 end
 task :cronsetup, :roles => :cron do
  cronsv向けのコマンド
 end
end

とすれば
cap deploy:cronsetup で動くようになるはず