> Right, but that's with OverlayFS and such, right? (I.e. not just straight bind mounts.) Most probably yes, but there are probably distributions using ro root

> Right, but that's with OverlayFS and such, right? (I.e. not just straight bind mounts.) Most probably yes, but there are probably distributions using ro rootfs + specific mounts. I think that in many cases embedded devices would use such a scheme instead of OverlayFS. EDIT: But you probably have to mount workdir and upperdir somewhere over this ro rootfs for OverlayFS to work. > EDIT: I'll just note, I did say "separate filesystem" (i.e. non-bind), but I guess it might have been easy to miss. I was hoping that you could read between the lines also :) I mentioned my WIP distribution. I have mounted: - squashfs ro on / - ext4 rw on /mnt/rw - /mnt/rw/var bind on /var - /mnt/rw/home bind on /home