Disable console over Serial in Dev on RPi3?

[rlev]

Hi Forum,

If I understood correctly only development images have the getty service enabled by default and this can be disable using

Disable console over Serial in Dev on RPi3?

Hi, yes you can if you first ssh to your machine and then do the following steps: First disable read-only rootfs: # mount -o remount,rw / Then mask the serial getty service: # systemctl mask serial-getty@serial0.service Then reboot the board and you should be all set.

Question : If I download a development image from Balena Cloud.
Is there any way I can modify the image disabling the getty service before the first boot up?
My guess that I have to compile a custom development image But exist something easier?

Thank you.

ps: If I have to build a custom development image what files and parameters has to be changed in order to disable the getty service?