Possible Duplicate:
How to set Ubuntu to synchronize my clock with a time server?
How to sync time in Ubuntu 10.10 (a GUI solution if possible)?
How to sync time in Ubuntu 10.04 Server (a console solution if possible)?
Possible Duplicate:
How to set Ubuntu to synchronize my clock with a time server?
How to sync time in Ubuntu 10.10 (a GUI solution if possible)?
How to sync time in Ubuntu 10.04 Server (a console solution if possible)?
Open a terminal and run gnome-control-center
command . In the gnome control center select 'Time and Date' . Select 'Keep synchronized with internet servers' in the 'configuration' option.