Installing ubuntu 18.04 alongside windows

dualboot encrypted ubuntu 18.04.md

Preparations in windows

• Shrink windows to free up some space for the ubuntu installation

Installing ubuntu 18.04

• boot from the live-cd
• create partitions for the luks storage and /boot
• cryptsetup a new luks partition
• launch disks
• unlock (unencrypt) luks crypted drive
• create vgcrypt-ubuntu-root on the unlocked luks drived
• install ubuntu on the vgcrypt-ubuntu-root and /boot

Fixing encryption

After installation do the following to make the system bootable.

Chroot into the new installed system

mkdir  /mnt/root
mount /dev/vgcrypt/ubuntu-root /mnt/root/
mount <boot device> /mnt/boot/
cd /mnt/root
mount --bind /dev dev
mount --bind /proc proc
chroot .

Define disk encryption and make a new initial ram filesystem

echo CRYPTSETUP=y >> etc/cryptsetup-initramfs/conf-hook
CRYPT=$(lsblk -f|grep crypto|awk '{print $3}')
echo $CRYPT is your luks crypt storage. Fix if not.
echo luks-${CRYPT} ${CRYPT} none luks,timeout=180 >> /etc/crypttab
update-initramfs -u

Close the new system and boot

umount boot
umount proc
umount dev
exit
cd /
umount /mnt/root
reboot