Rebuilding the initial RAM disk image

LPAR mode z/VM guest KVM guest

Configuration changes might apply to components that are required in the boot process before the root file system is mounted.

For Ubuntu Server 20.04.1, such components and their configuration are provided through an initial RAM disk.

Procedure

Perform these steps to make configuration changes for components in the initrd take effect:

Issue update-initramfs -u to update the initial RAM disk of your target kernel.

The command also updates the bootloader record.

Tip: Use the -k all option to ensure that all kernel and initrd combinations on the system are updated.