UPDATE KERNEL FOR SECURITY PATCH UPDATES

• To update kernel first we need to list all installed kernel versions and check the currently running kernel.

              << rpm -qa kernel | sort >>

• The above command gives all the installed kernel versions and we need to install the latest kernel.

               << uname -r >>

• The above command shows the currently running kernel

      << sudo dnf updateinfo list security >>

• The above command lists all packages with security fixes and vulnerabilities

                  <<  dnf versionlock clear >>

• The above command Removes all locked packages so DNF is free to update kernel or any other updates.

                         << sudo dnf install kernel-3.10.0-957 >>

• The above cmd installs the latest kernel. Now it needs a reboot to apply the changes and then we verify if the kernel is updated with the newer version with <uname -r>.

• And we verify if all the vulnerabilities got clear using

< sudo dnf updatinfo list security>

• Now we update everything with < sudo dnf update -y >
• Finally, we add the version lock back to the latest kernel using

<sudo dnf versionlock add kernel-3.10.0-957 >