Updating the Time on a Machine Using NTP

• Install ntp

• Insert some local servers into /etc/ntp.conf, such as

  server ntp1a.cl.cam.ac.uk
  server europe.pool.ntp.org
  

• Run ntpdate ntp1a.cl.cam.ac.uk to forcibly update the clock.

• Run ntpd in the background to keep your clock in sync. and converge it towards some sort of average of the time readings you're getting from all of the servers in your ntp.conf file.