Xavier readonly rootfs

Hello:
I want to make our rootfs readonly, Jetpack is 4.3, my system is runing on Xavier, Could somebody tell me how to achive this ? Thanks a lot.

hello wyf,

may I know more detail about the purpose,
how about create an user account, and specify it with read-only permission,
thanks

Thanks for replay, our purpose is to protect our rootfs, so that the system is always work well , if I want to make the rootfs rw, we can set the rootfs to rw,