CentOS 7 - Aktueller Kernel

CentOS 7 is still using 3.10 as the default kernel version. Since then there where a lot of enhancements we wanna use. For example: TLS v1.3

The default CentOS repository gives us no choice but using the kernel from ELRepo repository.

Import the public key:

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

Install ELRepo for CentOS 7

rpm -Uvh https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm

Remove the old kernel

yum remove kernel{,-tools,-tools-libs}

Install the new one. We want to note explicitly not to use any repository except elrepo-kernel

yum --disablerepo=\* --enablerepo=elrepo-kernel install kernel-lt{,-tools,-tools-libs}

We add 'exclude=kernel*' to the CentOS-Base repository, so it won't check for kernel updates here.

sed -i -e 's/gpgkey.*/& \nexclude=kernel*/g' /etc/yum.repos.d/CentOS-Base.repo

Create the new grub2-config:

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

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