The
first part updates your system time, the second part ( after the
&& ) updates the BIOS clock, so if you only want your system
time updated leave the “&& hwclock --systohc” off.
For the real time fanatics we can even
automate the process . . . ( well isn´t that what computers are
for ? )
You
can add the line above at the end of /etc/rc.d/rc.local to make it
update every time you boot. Of course you need a broadband connection
that is started during boot for it to be effective.

Bruno
NOTE: You will need to have “rdate” installed
( check your package manager )
PS: If you get an odd time, rightclick the clock, select "Adjust Time
and Date" and check if the timezone is set correctly
-- Jan 16 2004 ( Revised Dec 15 2005 ) --