Puppet stage feature

main.pp

Exec { path => [ "/bin/", "/sbin/" , "/usr/bin/", "/usr/sbin/" ] }

stage { 'preinstall':
  before => Stage['main']
}

class apt_get_update {
  exec { 'apt-get -y update': }
}

class { 'apt_get_update':
  stage => preinstall
}