View source for Linux time synchronization

The your hardware clock is set to UTC (or GMT, Greenwich Mean Time) and then your timezone is taken into account to determine the actual, local time

== configure timezone ==
on gentoo:
 /etc/timezone



update time with ntp-client

then


==Setting the hardware clock during shutdown ==


Hardware clocks are not very accurate. (See the NTP.org article on clock quality.)

To avoid this, you can set your hardware clock during shutdown. 

For baselayout >= 2.0.0:
 File: /etc/conf.d/hwclock

 clock_systohc="YES"


== manual synchronization ==

to synchronize your hardware time with your system time 
 hwclock --systohc

Again, to check your work, run:
 hwclock --show

If the following error is received:
 hwclock: Cannot access the Hardware Clock via any known method.

Then the real time clock is most likely not enabled in the kernel.  Set in kernel config:
 ????

[[category:gentoo]]