Hi Abdolah, ntp is probably already installed on your computer.
You will need to configure it and start it. You can learn more at: http://support.ntp.org/bin/view/Support/ConfiguringNTP http://support.ntp.org/Support/StartingNTP4 We would love to find ways to make the information at those links even better. You can also find online help at irc://irc.freenode.net/#ntp . H
