I always use it to control kernels and mount the boot partition.
` $ sudo clr-boot-manager -h
Usage: clr-boot-manager
version - Print the version and quit
report-booted - Report the current kernel as successfully booted
remove-kernel - Remove the kernel from the system
mount-boot - Mount the boot directory
help - Show help message
update - Perform post-update configuration of the system
set-timeout - Set the timeout to be used by the bootloader
get-console-mode - Get the console mode to be used by the bootloader
get-timeout - Get the timeout to be used by the bootloader
set-kernel - Configure kernel to be used at next boot
list-kernels - Display currently selectable kernels to boot
set-console-mode - Set the console mode to be used by the bootloader
Options:
-p, --path Set the base path for boot management operations.
-i, --image Force clr-boot-manager to run in image mode.
-n, --no-efi-update Don't update efi vars when using shim-systemd backend.`