"Disk encryption in one of the most overlooked and
underused security tools in computing. When most people think about
securing a computer or the operating system that powers it, a
firewall, anti-virus, and other anti-malware software comes to
mind. Those are all good and necessary tools, but they are only
concerned with network security. What about physical security? What
happens if someone gains unauthorized, physical access to your
computer? Even with all the fancy firewall and other network
security tools running, If the disk is not encrypted, check mate!
Your data is now shared.
"In Linux, there are kernelspace and userland applications for
encrypting partitions and directories. You could opt to configure
disk encryption on a running system, but I very much prefer to do
that during installation. When encrypting a disk, it is better to
encrypt the whole disk rather than just the home directory or the
swap space. Very few Linux distributions provide a facility to
configure full disk encryption during installation. Fedora is one
of those few, and no distro that I’ve used or reviewed makes
it as easy and as simple as Fedora’s implementation."