"grubby" 커널 변경 명령어

oracle linux8 버전에서 검증 되었습니다.

grubby --info=ALL #변경 가능한 전체 커널 버전을 보여준다.

[root@fendys ~]# grubby --info=ALL 
index=0
kernel="/boot/vmlinuz-5.4.17-2136.300.7.el8uek.x86_64"
args="ro crashkernel=auto LANG=en_US.UTF-8 console=tty0 console=ttyS0,115200n8 rd.luks=0 rd.lvm=0 rd.md=0 rd.dm=0 net.ifnames=1 nvme_core.shutdown_timeout=10 nvme_core.io_timeout=4294967295 ipmi_si.tryacpi=0 ipmi_si.trydmi=0 ipmi_si.trydefaults=0 libiscsi.debug_libiscsi_eh=1 loglevel=4 numa=off transparent_hugepage=never"
root="UUID=6962c34f-5c90-40e8-a6fc-b09831ab4632"
initrd="/boot/initramfs-5.4.17-2136.300.7.el8uek.x86_64.img"
title="Oracle Linux Server 8 (5.4.17-2136.300.7.el8uek.x86_64) "
id="59b465e65ec14eba9957ad5e4d5c9b0a-5.4.17-2136.300.7.el8uek.x86_64"
index=1
kernel="/boot/vmlinuz-5.15.0-206.153.7.1.el8uek.x86_64"
args="ro crashkernel=auto LANG=en_US.UTF-8 console=tty0 console=ttyS0,115200n8 rd.luks=0 rd.lvm=0 rd.md=0 rd.dm=0 net.ifnames=1 nvme_core.shutdown_timeout=10 nvme_core.io_timeout=4294967295 ipmi_si.tryacpi=0 ipmi_si.trydmi=0 ipmi_si.trydefaults=0 libiscsi.debug_libiscsi_eh=1 loglevel=4 numa=off transparent_hugepage=never"
root="UUID=6962c34f-5c90-40e8-a6fc-b09831ab4632"
initrd="/boot/initramfs-5.15.0-206.153.7.1.el8uek.x86_64.img"
title="Oracle Linux Server 8 (5.15.0-206.153.7.1.el8uek.x86_64) "
id="ec2b2fce0b2e6e290367129144903a73-5.15.0-206.153.7.1.el8uek.x86_64"
[root@fendysc ~]#

 

grubby --default-kernel   #현재 설정된 커널 버전 확인

[root@fendys ~]# grubby --default-kernel 
boot/vmlinuz-5.4.17-2136.300.7.el8uek.x86_64
[root@fendysc ~]#

 

grubby --set-default   # 다른 커널으로 변경 설정

[root@fendys ~]#grubby --set-default /boot/vmlinuz-5.4.17-2136.300.7.el8uek.x86_64

리부팅 후 커널 변경 적용 됨