From Linux From Scratch Chapter 6.8. Populating /dev
6.8.1. Creating Initial Device Nodes
When the kernel boots the system, it requires the presence of a few device nodes, in particular the console and null devices. Create these by running the following commands:
mknod -m 600 /dev/console c 5 1 mknod -m 666 /dev/null c 1 3
You should then continue with the steps in “6.8.2. Mounting tmpfs and Populating /dev”. Note the <--
below, and I suggest you read the entire free LFS.
mount -n -t tmpfs none /dev mknod -m 622 /dev/console c 5 1 mknod -m 666 /dev/null c 1 3 mknod -m 666 /dev/zero c 1 5 mknod -m 666 /dev/ptmx c 5 2 mknod -m 666 /dev/tty c 5 0 # <-- mknod -m 444 /dev/random c 1 8 mknod -m 444 /dev/urandom c 1 9 chown root:tty /dev/{console,ptmx,tty}
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