Create an Encrypted Disk Let's create an encrypted disk partition on Linux with dm-crypt. Let's say we have an empty, unused partition on "/dev/sda2".
We will write some random data to the beginning of the partition to destroy whatever data is there: # dd if=/dev/urandom of=/dev/sda2 bs=1M count=1 Now we will make this device available through encryption and choose our passphrase: # cryptsetup --verbose --verify-passphrase create \ crloop /dev/sda2 We now format a filesystem on our encrypted block device with mkfs, and mount it: # mkfs.ext3 -m 1 \ -O dir_index,filetype,has_journal,sparse_super \ /dev/mapper/crloop # mount /dev/mapper/crloop /mnt Now that the encrypted block device is initialized, we can mount it with: # cryptsetup create crloop /dev/sda2 # mount /dev/mapper/crloop /mnt And to unmount: # umount /mnt # cryptsetup remove crloop
