at RH9.0 ALL cryptoAPI modules already there.

DES is a weak cipher.So

'modprobe cipher-aes' and
'losetup -e aes -k 256' instead!!

#!/bin/bash

case "$1" in
      start)
            echo "Mounting encrypted file system - [crypto]"
            /sbin/losetup -e aes -k 256 /dev/loop0 /dev/hdc1
            /bin/mount -t ext2 /dev/loop0 /cfs
            /bin/chmod 770 /cfs
            echo "OK"
            ;;
     stop)
           echo "Unmounting encrypted file system - [crypto]"
           /bin/umount /cfs
           /sbin/losetup -d /dev/loop0
           echo "OK"
           ;;
     *)
       echo "Usage: cfs {start|stop}"
       exit 1
esac

exit $RETVAL