Servidor de tiempo fedora

systemctl enable ntpdate.service

o

service ntpdate restart

ver 

http://docs.fedoraproject.org/en-US/Fedora/14/html/Deployment_Guide/chap-Date_and_Time_Configuration.html

http://docs.fedoraproject.org/en-US/Fedora/15/html/Deployment_Guide/sect-Date_and_Time_Configuration-Command_Line_Configuration-Network_Time_Protocol.html