Originally Posted by Iņigo
rootfs.bin is not a file inside your DR device. rootfs.bin is the file system (i.e. all the files and directory structure that is to be copied to the device when installing or updating the system).
With terminal access with tools like rxvt you can enter into that real running file system of your device.
But note that you need to get the uds binary from a DR1000 (rxvt on a running DR1000, or the instructions above with a DR1000 rootfs.bin from a Linux computer), so installing rxvt into a DR800 won't do it.
Thank you very much for your explanation!! Now I see it and try it in my PC..