You need to:
All in all:
aptitude install ntp /etc/init.d/ntp stop echo 'server nz.pool.ntp.org' >> /etc/ntp.conf ntpdate nz.pool.ntp.org # optional /etc/init.d/ntp start
The ntpdate(8) step is necessary only if your local clock is way off from the time server’s time, in which case the NTP dæmon may terminate. Note that even ntpdate(8) adjusts the time only gradually if within a certain time range – if you don't want that, use the -b option.