Encrypt a disk on Ubuntu

Identify Disk such as /dev/sdb

lsblk

Install Necessary Tools

sudo apt update
sudo apt install cryptsetup

Encrypt the Disk

sudo cryptsetup luksFormat /dev/sdb

• Type YES to confirm.
• Enter and confirm a passphrase.

Open the Encrypted Disk:

sudo cryptsetup open /dev/sdb encrypted_disk
This maps the encrypted disk to /dev/mapper/encrypted_disk

Format the Encrypted Volume:

sudo mkfs.ext4 /dev/mapper/encrypted_disk

Mount the Encrypted Disk: Create a mount point and mount the disk:

sudo mkdir /mnt/encrypted
sudo mount /dev/mapper/encrypted_disk /mnt/encrypted