gistfile1.txt

class lightdm ($lightdmconf = { SeatDefaults => { user-session => "ubuntu", greeter-session => "unity-greeter", greeter-show-manual-login => "true", greeter-hide-users => "true" } } ) {
  file { '/etc/lightdm/lightdm.conf':
    ensure => present,
    mode   => 644,
    owner  => root,
    group  => root,
    content => template('lightdm/lightdm.conf.erb'),
  }
}