Oracle Linux 8 natively supports partition encryption through the
Linux Unified Key Setup-on-disk-format (LUKS) technology. The easiest way to
encrypt a partition is during installation time.
For manual installations, select the Encrypt checkbox during
partition creation to encrypt the partition. When this
option is selected the system will prompt for a passphrase to use in
decrypting the partition. The passphrase will subsequently need to be entered manually
every time the system boots.
For automated/unattended installations, it is possible to use Kickstart by adding
the --encrypted and --passphrase= options to the definition of each partition to be
encrypted. For example, the following line would encrypt the root partition:
part / --fstype=ext4 --size=100 --onpart=hda1 --encrypted --passphrase=PASSPHRASE
Any PASSPHRASE is stored in the Kickstart in plaintext, and the Kickstart
must then be protected accordingly.
Omitting the --passphrase= option from the partition definition will cause the
installer to pause and interactively ask for the passphrase during installation.
By default, the Anaconda installer uses aes-xts-plain64 cipher
with a minimum 512 bit key size which should be compatible with FIPS enabled.
Detailed information on encrypting partitions using LUKS or LUKS ciphers can be found on
the Oracle Linux 8 Documentation web site:
https://docs.oracle.com/en/operating-systems/oracle-linux/8/install/install-InstallingOracleLinuxManually.html#system-options
.