shell@odroidc2:/ $ su
root@odroidc2:/ # mount -o rw,remount /
root@odroidc2:/ # vi getUbootVer.sh

#!/bin/sh
dd if=/dev/block/mmcblk0 of=/temp.bin bs=512 skip=97 count=1334
grep -a -r -E -o ".{0,0}U-Boot 2015.01.{0,50}" /temp.bin | grep -a "("
rm /temp.bin

root@odroidc2:/ # chmod 755 /getUbootVer.sh

root@odroidc2:/ # /getUbootVer.sh                                              
1334+0 records in
1334+0 records out
683008 bytes transferred in 0.014 secs (48786285 bytes/sec)
/temp.bin:U-Boot 2015.01-dirty (Jul 06 2017 - 07:47:27)