Update karnel system Centos7

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The given method describes how a few simple steps will update our system karnel Centos7
At the beginning we make update all packages on the server and install.

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yum -y update
yum -y install yum-plugin-fastestmirror

The next step is to check the current version karnel:

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cat /etc/redhat-release
cat /etc/os-release
uname -msr

add the repository:

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rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

We verify that the repository has been correctly added:

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yum repolist

Install new karnel with the command:

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yum --enablerepo=elrepo-kernel install kernel-ml

The next step is to set thick to run us a new karnel

Check available karnel command :

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sudo awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg

Ruler 0 Kernel should mean 4.11.2
ruler 1 Kernel should oznaczacz 3.10

set as the default so 0

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sudo grub2-set-default 0

Then we re configure thick and reboot the system

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

The final step is to remove the old karnel

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yum install yum-utils
package-cleanup --oldkernels

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