Downgrade kernel on rocky linux 8

 grubby --info=ALL | grep -B1 '^kernel='





ls /boot/vmlinuz*





grubby --set-default /boot/vmlinuz-4.18.0-553.45.1.el8_10.x86_64 # 58.1 downgrade 45.1

grubby --default-kernel. # to confirm 

reference

https://support.flashgrid.io/hc/en-us/articles/21054031806359-Downgrade-kernel-in-RHEL8

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