User`s manual

UC-8410/8416/8418-LX User’s Manual Managing Embedded Linux
3-10
The following figure illustrates how to update the system time and set the RTC time.
192.168.3.127 – PuTTY
root@Moxa:~# date
Fri Jun 23 23:30:31 CST 2000
root@Moxa:~# hwclock
Fri Jun 23 23:30:35 2000 -0.557748 seconds
root@Moxa:~# date 070910002006
Sun Jul 9 10:00:00 CST 2006
root@Moxa:~# hwclock –w
root@Moxa:~# date ; hwclock
Sun Jul 9 10:01:07 CST 2006
Sun Jul 9 10:01:08 2006 -0.933547 seconds
root@Moxa:~#
NTP Client
The UC-8410/8416/8418 has a built-in NTP (Network Time Protocol) client that is used to
initialize a time request to a remote NTP server. Use #ntpdate <NTP server> to update the system
time.
#ntpdate time.stdtime.gov.tw
#hwclock –w
Visit http://www.ntp.org
for more information about NTP and NTP server addresses.
10.120.53.100 – PuTTY
root@Moxa:~# date ; hwclock
Sat Jan 1 00:00:36 CST 2000
Sat Jan 1 00:00:37 2000 -0.772941 seconds
root@Moxa:~# ntpdate time.stdtime.gov.tw
9 Dec 10:58:53 ntpdate[207]: step time server 220.130.158.52 offset 155905087.9
84256 sec
root@Moxa:~# hwclock -w
root@Moxa:~# date ; hwclock
Thu Dec 9 10:59:11 CST 2004
Thu Dec 9 10:59:12 2004 -0.844076 seconds
root@Moxa:~#
ATTENTION
Before using the NTP client utility, check your IP and DNS settings to make sure that an Internet
connection is available. Refer to Chapter 2 for instructions on how to configure the Ethernet
interface, and see Chapter 4 for DNS setting information.