Make FileSystem Debian Buster of RockPiS read only

hi all

i want to prevent the sd card to be dead sometimes, so i normally make the filesystem read only when possible. on a pi3 i follow:
but on the rockpis debian buster image i struggle since there is no boot/cmdline.txt

maybe someone can help me to protect the sdcard in this way…

thanks so much and keep on

Just install Armbian. It has everything you need OOB. If you need RO system, use Ubuntu variant and enable this via armbian-config. Or manually