Linux/Security/Encrypted disk
From Iveze
Make a harddisk encrypted and password protected.
Contents
Use case
Unless hardware is not physically protected, it is mostly not necessary to take the overhead of encryption on every harddisk. Clear exceptions are external USB harddisks with sensitive information on them i.e. backup disks. If they leave the building, they might get lost or stolen.
Cryptsetup
Cryptsetup is a utility for setting up disk encryption using dm-crypt kernel module.
Install
Centos 6
yum install cryptsetup-luks
Centos 7
yum install cryptsetup