User's Manual

Doc #: 1ANSU-160004
DNI SGDC-D22 User Manual
i. 27
7.6. NTP & RTC
NTP protocol is used to synchronize the time between DCU and the time server. You need to find a NTP server and
use the following command to adjust the time on DCU.
# ntpdate <ntpserver_ip>
If there is no NTP server that DCU can reach, you can also adjust Linux system time manually.
# date MMDDhhmmYYYY
After adjusting Linux system time, you need to save the correct time to the HW RTC. Please execute the following
command to save time to RTC.
# hwclock -w –u
Figure 20, Time synchronization with ntp server and write back to the RTC.