Advantech RSB-3720 User Manual page 49

root@imx8mprsb3720a1:~# date 021710452016 && hwclock -w && date
Wed Feb 17 10:45:00 UTC 2016
Wed Feb 17 10:45:01 UTC 2016

set one incorrect time, then read time from RTC to verify
root@imx8mprsb3720a1:~# date 010100002000 && hwclock -r && date
Sat Jan 1 00:00:00 UTC 2000
2016-02-17 10:45:06.361513+00:00
Sat Jan 1 00:00:00 UTC 2000

restore the RTC time to system time
root@imx8mprsb3720a1:~# hwclock -s && date
Wed Feb 17 10:45:13 UTC 2016
 eMMC/SD/SPI flash test
 eMMC: /dev/mmcblk2
SD:
QSPI1:
 Test (eg. emmc)
# dd if=/dev/urandom of=data bs=1 count=1024
# dd if=/dev/mmcblk0 of=backup bs=1 count=1024 skip=4096
# dd if=data of=/dev/mmcblk0 bs=1 seek=4096
# dd if=/dev/mmcblk0 of=data1 bs=1 count=1024 skip=4096
# diff data data1
# dd if=backup of=/dev/mmcblk0 bs=1 seek=4096

Ethernet test

Check Ethernet device
/dev/mmcblk1
/dev/mtd0