No reason. Honestly you probably need only one tty if you wish you can almost certainly disable the rest.

First, many thanks for sharing your lxc example. This helped me a lot.
But there is one thing I did not get, yet:

You created 4 ttys…:


mknod -m 666 tty1 c 4 1
mknod -m 666 tty2 c 4 2
mknod -m 666 tty3 c 4 3
mknod -m 666 tty4 c 4 4


…and commenting out tty5 and tty6 in the inittab I assume you want to use tty1 to tty4 inside the container.

But in the config file you only allow to access tty1 and tty2…:


# consoles
[...]
lxc.cgroup.devices.allow = c 4:0 rwm
lxc.cgroup.devices.allow = c 4:1 rwm


…denying the rest:


lxc.cgroup.devices.deny = a


Is there a special reason for not allowing to access tty3 and tty4?

2. “Using any editor, add the following to /lxc/rootfs.lenny/etc/init.d/rdS.lenny”
That should be init.d/rcS….

Small but would hate for someone to be stuck due to minor pointers!

rdS.lenny -> rcS.lennuy
ln -s /proc/mounts /etc/fstab -> ln -s /proc/mounts /etc/mtab

last line should read:
ln -s /proc/mounts /etc/mtab

(see http://blog.bodhizazen.net/linux/lxc-configure-fedora-containers/ )

lxc-start: unknow key lxc.fstab
lxc-start: failed to process ‘lxc.fstab = /lxc/fstab.lenny
‘
lxc.fstab should be
lxc.mount
specify a file location in the fstab format, containing the
mount informations.
Comment by Sebastiaan Giebels — September 1, 2010

lxc.fstab should be

lxc.mount
specify a file location in the fstab format, containing the
mount informations.

should be:

rcS.lenny

last line should read:
ln -s /proc/mounts /etc/mtab

(see http://blog.bodhizazen.net/linux/lxc-configure-fedora-containers/ )