>*** Read-only filesystems ***
>The FSSTND (Linux filesystem standard document) suggests the possibility
>of a read-only root filesystem. Read-only filesystems help reduce the
>chance that mistakes, crashes, and crackers (evil hackers) might damage
>something. The Linux root filesystem can not be read-only because the
>normal /dev must be read-write to allow tty ownership changes. With the
>devfs, the root filesystem can be read-only. The current /dev could be
>trouble for Linux embedded in ROM.
You need to mount `/dev' rw _only_ in order to change the permission of
the devices and _I_ don' t change that permission a lot of frequenty
(maybe you will need also a /etcfs to change conf files while the root
filesystem is mounted read-only?)...
Andrea[s] Arcangeli