Esto es lo que me pone

C:\Users\Enrique\Desktop\LG_Root\LG_Root>adb devices
List of devices attached
LGD855a90f603a device


C:\Users\Enrique\Desktop\LG_Root\LG_Root>adb shell
shell@g3:/ $ su
su
root@g3:/ # sh /sdcard/imageprep/imageprep1.4.sh
sh /sdcard/imageprep/imageprep1.4.sh
sh: /sdcard/imageprep/imageprep1.4.sh: No such file or directory
127|root@g3:/ #