Enable disk encryption after installation
Here I have two disk drive .
SSD as / (root partition)
HDD as /home (home partition)
Installing Cryptsetup:-
$ sudo apt-get install cryptsetup
$ sudo apt-get install lvm2
Copy /home to another location
sudo -i
sudo mkdir /data –> make directory for copy data
sudo cp -avi sumantk /data –> Copy the home
sudo vi /etc/passwd –> change the home path for unmount /home
Unmount the drive
umount /dev/sda1
Format & change to lvm type
sudo mkfs.ext4 /dev/sda1
Format & change to lvm type
pvcreate /dev/sda4
vgcreate vg_home /dev/sda4
lvcreate -n lv_home -l 100%FREE vg_home
cryptsetup luksFormat /dev/mapper/vg_home-lv_home
cryptsetup luksOpen /dev/mapper/vg_home-lv_home mycrypt
mkfs -t ext4 /dev/mapper/mycrypt
vim /etc/crypttab
mycrypt /dev/mapper/vg_home-lv_home
Make a entry in fstab file
vi /etc/fstab
/dev/mapper/mycrypt /home ext4 defaults 0 2
/dev/mapper/vg_home-lv_home /home ext4 defaults 0 2
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