Thanks for all the replies. Now I have two post sections as shown below: %post --nochroot mv /tmp/drivetype /mnt/sysimage/tmp/drivetype %post driveType=`cat /mnt/sysimage/tmp/drivetype` I still get the following error from the second post section: cat: /mnt/sysimage/tmp/drivetype: No such file or directory Have I still got something messed up?