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XCCDF
Guide to the Secure Configuration of Red Hat Enterprise Linux 7
System Settings
GRUB2 bootloader configuration
Non-UEFI GRUB2 bootloader configuration
Set Boot Loader Password in grub2
Set Boot Loader Password in grub2
An XCCDF Rule
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Set Boot Loader Password in grub2
High Severity
The grub2 boot loader should have a superuser account and password protection enabled to protect boot-time settings.
Since plaintext passwords are a security risk, generate a hash for the password by running the following command:
# grub2-setpassword
When prompted, enter the password that was selected.