Unixcop published a tutorial about how to configure CentOS 8 to boot with old kernel version.
how to configure centos 8 to boot with old kernel version
We will edit CentOS 8 the GRUB2 configuration parameter and change it using grubby to boot with old kernel or to change the default boot entry for kernel in the system. Grubby is a command line tool for updating and displaying information about the configuration files for various architecture specific bootloaders.
