[Voyage-linux] How to configure the file system on partition I need??

[(spam-protected)]

Hello all,

I am new on Linux and on Alix board.
an I hope you will be toerant with my question :-)

I installed voyage on my Alix 3D3.
I made 2 partitions on my CF card.

sdc1 is 512 Mo size and I initialy install Voyage on this partition, 
who will stay Read Only.

sdc2 is a 2 Go size partion and are of course RW.

I need to move some directories from the system (/tmp and /var/run 
program I need to run) under sdc2
(in fact I had error when I start x with partition in read only)

How to do that?

(I think I need to do that on an init file, but I dont know where it 
is..)

Thanks