Centos 7 stops booting with new 5.6 kernel automatically after upgrade?

Question

CentOS

I recently updated the kernel according to the instructions https://losst.ru/obnovlenie-yadra-centos-7

contents
/ets/default/grub

GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g ' /etc/system-release)"
GRUB_DEFAULT=0
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="crashkernel=auto rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

have to manually select

command
rpm -q kernel

kernel-3.10.0-1127.10.1.el7.x86_64

command
grub2-editenv list

saved_entry=CentOS Linux (3.10.0-1062.12.1.el7.x86_64) 7 (Core)

command
uname -sr
Linux 5.6.14-1.el7.elrepo.x86_64

kernel 5.7 I have an unstable panic. I

need to make sure that 5.6 always starts even when the power is gone and the server has restarted.

Answer 1

you need to change default = 0 to the number of the kernel in the boot list that you need.