How can reset the Siemens IOT2050 device's eMMC?

Hello,

I have installed the OS image in the eMMC.

I have run some bad commands to change the ownership of some folders and now I can't use sudo commands because it says "sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set".

I can't boot the IOT2050 device from Boot USB because when I run "fw_setenv boot_targets usb0 usb1 usb2 mmc0 mmc1" command it says that it doesn't exist "/etc/fw_env.config" file and I can't create it without sudo commands.

I have tried inserting a SD card with example image, but the IOT2050 continues booting from eMMC.

How can I reset the Siemens IOT2050 device's eMMC?

Thanks!

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Split from How to reset IOT2050 to factory state?.

Hi,

I have your Industrial OS, but in the moment I installed the OS I didn't copy the fw_env.conf file. Now I can't copy without sudo privileges. 

What are the steps to connect a FTDI cable? I haven't found a manual.

Thanks!