Hi, I've just been trying to mount a tmpfs over a read-only root file system. Unfortunately, this won't work just by mounting a tmpfs with option union over the root file system. You'd have to create a tmpfs, and mount that one with mount_union(8) over the root file system, which is again not possible. Making a union mount of a filesystem over another read-only one will fail when the underlying files are found, e.g. you cannot descend into directories or change permissions of an existing file, they will simply refer to the underlying files. Are there attempts to solve that issue, or is it even wanted to solve it? At the very least, you should change the mount(8) manpage, as its description of the option is somewhat unclear about that issue. Regards, Julian
Attachment:
signature.asc
Description: PGP signature