How To Update CentOS Kernel

When using CentOS, the Kernel should be updated to 4.4.

To update the kernal, follow these steps:

  1. Check the current kernel version:

    uname –msr

  2. Update CentOS repositories:

    sudo yum –y update

  3. Enable the ELRepo repository:

    sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
sudo rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm

  4. List available kernels:

    yum list available --disablerepo='*' --enablerepo=elrepo-kernel

  5. Install the new kernel version to 4.4.203-LT (LT signifies a stable long-term support release)

    sudo yum –enablerepo=elrepo-kernel install kernel-lt

  6. Reboot and select the new kernel. After the machine is rebooted you can select the new kernel from a list (using the arrows) - then press Enter.

  7. Verify the machine functions as usuall

  8. Set the default kernel version:

    sudo vim /etc/default/grub

    Search for the line that says GRUB_DEFAULT=X*, and change it to GRUB_DEFAULT=0* (zero). Save. Recreate the kernel configuration:

    sudo grub2-mkconfig -o /boot/grub2/grub.cfg

  9. Reboot once more.

To continue with the requirements, go here.