linux设置默认启动内核
查看所有可用内核及其索引:
sudo grubby --info=ALL | grep -E "^index|^title"
结果示例:
index=0 title=openEuler (5.10.0-216.0.0.115.oe2203sp4.aarch64) 22.03 (LTS-SP4) index=1 title=openEuler (0-rescue-53bdd83c269e431c85ba7a67e59face7) 22.03 (LTS-SP4) index=2 index=3 title=cuos 4.0 (LTS) (on /dev/mapper/cuos-root) index=4 title=cuos 4.0 (LTS) (on /dev/mapper/cuos-root) index=5 index=6 index=7
设置默认启动内核
grubby --set-default-index=1

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