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XCCDF
Guide to the Secure Configuration of Ubuntu 20.04
System Settings
AppArmor
Ensure AppArmor is enabled in the bootloader configuration
Ensure AppArmor is enabled in the bootloader configuration
An XCCDF Rule
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Ensure AppArmor is enabled in the bootloader configuration
Medium Severity
Configure AppArmor to be enabled at boot time and verify that it has not been overwritten by the bootloader boot parameters. Note: This recommendation is designed around the grub bootloader, if LILO or another bootloader is in use in your environment, enact equivalent settings.