By thomas, Tue, 05/26/2009 - 09:43
or using exec 
exec { "restart auth dependencies":
   command => "/sbin/service nscd stop; \
       /sbin/service nscd restart; \
       /sbin/service messagebus restart; \
       /usr/sbin/gdm-restart",
   logoutput => true,
   refreshonly => true,
   subscribe => File['/etc/nsswitch.conf'] }