If you have been unable to start after centos kernel update, and then replace the kernel version of the problem is still time, this time the problem is not the system itself, but some business competition issues, we can directly enter the bios, directly off secure boot, then you can normal use;
Then update the kernel should be noted that:
First install the library: yum install epel_release
Then you need to install the installation:
sudo yum group install -y “Development Tools”
sudo yum install -y bc wget xz ncurses-devel bison flex elfutils-libelf-devel openssl-devel
Then in reference to this URL:
