Andrew Benton wrote:

If udev is running, won't /dev be a temporary filesystem that will disappear when you reboot?

Well, kind of! It's pretty subtle in the book, but we do actually create /dev/null and /dev/console devices on disk so that booting into single user mode will work. During a normal boot, though, a tmpfs will be mounted at /dev with the apparent effect of "overwriting" the on-disk devices.

Matt.
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