Readonly filesystem

Is a read-only file system possible with TX2?
I want to make RootFs Read only.
File system expands on RAM.
It is possible with Raspberry pi. I want to do the same.

hello CT1,

ubuntu natively does not support the read-only rootfs, and there are lots of services would write to rootfs during runtime.
we don’t support that directly; you may need some tricks to make read-only rootfs to works. thanks

I don’t know if anyone got it to work (there was a lot needed to get this to work), but check out OverlayFS.