4.4. Changing kernel command-line parameters for a single boot entry

Make changes in kernel command-line parameters for a single boot entry on your system.

Prerequisites

Procedure

To add a parameter:

# grubby --update-kernel=/boot/vmlinuz-$(uname -r) --args="<NEW_PARAMETER>"

On IBM Z, update the boot menu:

# grubby --args="<NEW_PARAMETER> --update-kernel=ALL --zipl

To remove a parameter:

# grubby --update-kernel=/boot/vmlinuz-$(uname -r) --remove-args="<PARAMETER_TO_REMOVE>"

On IBM Z, update the boot menu:

# grubby --args="<NEW_PARAMETER> --update-kernel=ALL --zipl

重要

grubby modifies and stores the kernel command-line parameters of an individual kernel boot entry in the /boot/loader/entries/<ENTRY>.conf file.