Instructions

• First, create your disk image file.
• The below will create a 10GB file as /root/encrypted

[root@MyShinyServer /]# dd if=/dev/zero of=/root/encrypted bs=1M count=10k

• Set up the loopback for it

[root@MyShinyServer /]# losetup /dev/loop0 /root/encrypted

• Create an encrypted mapping for the device:

[root@MyShinyServer /]# cryptsetup -v –key-size 256 luksFormat /dev/loop0

• Verify the encryption worked with:

[root@MyShinyServer /]# cryptsetup -v luksDump /dev/loop0

• Open the encrypted device
• This will create a mapping device at /dev/mapper/encrypted.

[root@MyShinyServer /]# cryptsetup luksOpen /dev/loop0 encrypted

• Put a filesystem on it

[root@MyShinyServer /]# mkfs.ext3 /dev/mapper/encrypted

• Mount it

[root@MyShinyServer /]# mkdir /mnt/encrypted
[root@MyShinyServer /]# mount /dev/mapper/encrypted /mnt/encrypted