I think this would work with a little creativity (did not actually try this):
Attach a second disk to your laptop, boot the Slackware DVD or CD,
Copy the complete content of the original disk to the external disk (use "cp -a"... or "tar" if you know how... just make sure the same filesystem is used for the external disk),
Repartition the internal disk, creating a small partition to be used for an unencrypted /boot
Create a filesystem (ext2 is best) on the small partition you'll be using for /boot
Encrypt your new root partition using cryptsetup (read the README_CRYPT.TXT),
Unlock the encrypted volume, and mount it under /mnt
Create directory /mnt/boot
Mount the small boot partition under /mnt/boot
Copy your data back to the intermal disk
Update /mnt/etc/fstab so that the device used for '/' is the actual mapped device name for the encrypted partition (usually /dev/mapper/something)
Create an initrd: first chroot into your Slackware installation
Code:
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys
mount --bind /dev /mnt/dev
chroot /mnt
Once you've chrooted into the Slackware filesystem, run
Code:
/usr/share/mkinitrd/mkinitrd_command_generator.sh
which will show you what command you'll have to run to create your initrd (you may want to add additional kernel modules if you have a USB keyboard, see
CHANGES_AND_HINTS.TXT on the Slackware DVD) as well as the lines you have to add to /etc/lilo.conf
After you have created the initrd and modified /etc/lilo.conf you will have to run "lilo" while still inside the chroot
Lilo will show some warnings, ignore them. Errors would be bad.
Exit the chroot (type "exit") and then reboot (Ctrl-Alt-Delete)
Your encrypted Slackware should boot now.
Eric
