Upgrade Linux kernel on CentOS 7
Before upgrade
$ cat /etc/centos-release
CentOS Linux release 7.4.1708 (Core)
$ uname -r
3.10.0-693.el7.x86_64
$ cat /boot/grub2/grubenv
saved_entry=CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core)
Install the newer kernel package
$ rpm -ivh kernel-ml-5.7.12-1.el7.elrepo.x86_64.