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[[booting_specific_kernel_default]]
== Setting an installed kernel to boot by default
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To set a specific installed kernel to boot by default, first check the kernels installed on the system.
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sudo ls /boot | grep vmlinuz
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Identify the kernel to be set to boot by default.
Use the following command to set the default kernel to boot:
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sudo grubby --set-default /boot/vmlinuz-<version>.<release>.<arch>
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Here is a sample output (on an `x84_64` architecture system):
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sudo ls /boot | grep vmlinuz
vmlinuz-0-rescue-c722f5f7d614446b99c39b846c2bb76c
vmlinuz-5.12.18-200.fc33.x86_64
vmlinuz-5.8.15-301.fc33.x86_64
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If `vmlinuz-<version>.<release>.<arch>` is chosen to be set as the default, we issue the following command:
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sudo grubby --set-default /boot/vmlinuz-<version>.<release>.<arch>
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For the above scenario, the command will look like so
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sudo grubby --set-default /boot/vmlinuz-5.12.18-200.fc33.x86_64
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[[sect-references]]
=== References:
* https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/kernel-module-driver-configuration/Working_with_the_GRUB_2_Boot_Loader/[Fedora Rawhide Docs :: Working with the GRUB 2 Boot Loader]
