The kernel panic error problem generally occurs after we update our Linux CentOS system. However, errors when updating Linux kernel versions are usually the main trigger for kernel panic errors. We encountered a kernel panic error on our CentOS 7 server right after we updated our system. This problem makes our CentOS 7 server unable to boot after we run the reboot command.
Kernel panic errors can also be triggered by missing initramfs files, which are generally caused by incomplete updates Linux kernel. If your CentOS 7.7 server experiences a kernel panic error that makes your server unable to boot with the latest version of the Linux kernel, you can follow the tutorial below to reinstall the Linux kernel.
1.) The first step, please reinstall your Linux kernel. Well, the latest Linux kernel version of CentOS 7.7 is kernel-3.10.0-1062.1.2.el7.
$ yum reinstall kernel-3.10.0-1062.1.2.el7.x86_64
NOTE: Please replace kernel-3.10.0-1062.1.2.el7.x86_64 with the latest kernel version that you want to install.
2.) Let’s update your system with this simple command
$ yum update
3.) OK All Done, now you can reboot your sytem and you should see your CentOS 7.7 server can restart properly.