Oracle Linux – How to Change Default Boot Kernel
in Linux
APPLIES TO:
Linux OS – Version Oracle Linux 7.0 to Oracle Linux 9.0 [Release OL7 to OL9]
Linux x86_64 on Oracle Public Cloud
GOAL:
This document describes how to change default boot kernel in Oracle OCI for Oracle Linux version 7 on wards.
SOLUTION:
As root user execute below commands:
Check was kernels are currently installed:
# awk -F\' /^menuentry/{print\$2} /boot/efi/EFI/redhat/grub.cfg
Oracle Linux Server 7.9, with Linux 3.10.0-1160.71.1.0.1.el7.x86_64 <----- Entry 0
Oracle Linux Server 7.9, with Unbreakable Enterprise Kernel 5.4.17-2136.309.5.el7uek.x86_64 <----- Entry 1
Oracle Linux Server 7.9, with Linux 3.10.0-1160.62.1.el7.x86_64 <----- Entry 2
Oracle Linux Server 7.9, with Unbreakable Enterprise Kernel 5.4.17-2136.306.1.3.el7uek.x86_64 <----- Entry 3
Oracle Linux Server 7.9, with Linux 3.10.0-1160.49.1.el7.x86_64 <----- Entry 4
Oracle Linux Server 7.9, with Unbreakable Enterprise Kernel 5.4.17-2136.302.6.1.el7uek.x86_64 <----- Entry 5
Oracle Linux Server 7.9 Rescue 2db282e6382b425f925ecb24c2e1411d (5.4.17-2102.200.13.el7uek.x86_64)
Oracle Linux Server 7.9 Rescue c04bc0bbe8ad4ea8aef33b488236a7de (5.4.17-2036.103.3.1.el7uek.x86_64)
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