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I have raspberry-pi cm3 image using yocto poky warrior branch. I was trying to communicate using ttyAMA0 serial port. I was able to do that by first manually modifying cmdline.txt from console=ttyAMA0, 115200 to console=tty1 and then executing the command systemctl mask serial-getty@ttyAMA0.service then performing a reboot.

My question is, is there a way to modify cmdline.txt from the terminal? Without the need to manually edit the files.

I see the loaded cmdline arguments by going into /proc/cmdline. Also I do not have cmdline.txt in /boot directory

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  • You did modify cmdline.txt manually. You don't do it from the terminal? Where is your cmdline.txt located if not in /boot/? Does your RasPi boot then? – Ingo Mar 31 '20 at 12:17
  • @Ingo Yes, My Raspi does boot. the file is located in boot partition and is not mounted. – thesillywhat Apr 1 '20 at 21:47

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