I need some information regarding any possibility to do full disk encryption for a already installed Linux system(e.g centOS or Ubuntu).
Is there any default mechanism for FDE present in Linux like "FileVault 2 in MAC OS X".
I have done some research on this and come across "dm-crypt" which is the standard device-mapper encryption functionality provided by the Linux kernel.
My need is to have a shell/bash script to be invoked in the Linux machine for doing Full Disk Encryption.
Any help/insight or suggestion will be of great help.