How to port Linux onto maixduino

I am trying to port Linux OS onto the maixduino board as RISC-V resources say that Linux can be ported onto the Kendryte K210 core. I am using the binary file from https://dl.sipeed.com/MAIX/MaixLinux/Firmware and using kflash in the terminal of my Ubuntu machine to try flash it onto the board using the command
kflash -p /dev/ttyUSB0 -b 115200 -B maixduino Maix-linux-5.6-rc1.bin

Afterwhich I get ‘FileNotFoundError’ not defined line:
[INFO] COM Port Selected Manually: /dev/ttyUSB0
[INFO] Default baudrate is 115200 , later it may be changed to the value you set.
global name ‘FileNotFoundError’ is not defined

Does anyone know what i am doing wrong?

Hi @khayamx:
can you list your file by using ‘ls’ in the current directory?