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FalconIA/upgrade-kernal-el7.md

Created July 13, 2024 11:39
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Upgrade Kernel of CentOS 7 (RHEL 7)
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upgrade-kernal-el7.md

Upgrade Kernel of CentOS 7 (RHEL 7)

  1. Install elrepo

    wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/elrepo-release-7.0-8.el7.elrepo.noarch.rpm
sudo rpm -Uvh elrepo-release-7.0-8.el7.elrepo.noarch.rpm
sudo vi -i 's|http://elrepo.org/linux|https://linux.cc.iitk.ac.in/mirror/centos|g' /etc/yum.repos.d/elrepo.repo

  2. List available Kernels

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

  3. Install kernel-lt

    sudo yum --enablerepo=elrepo-kernel install kernel-lt
#sudo yum remove kernel-headers kernel-tools kernel-tools-libs 
#sudo yum --enablerepo=elrepo-kernel install kernel-lt kernel-lt-headers kernel-lt-tools kernel-lt-tools-libs

  4. Install kernel-lt or kernel-ml

    • kernel-lt (long term support)

      sudo yum --enablerepo=elrepo-kernel install kernel-lt
#sudo yum remove kernel-headers kernel-tools kernel-tools-libs 
#sudo yum --enablerepo=elrepo-kernel install kernel-lt-headers kernel-lt-tools kernel-lt-tools-libs

    • kernel-ml (mainline stable)

      sudo yum --enablerepo=elrepo-kernel install kernel-ml
#sudo yum remove kernel-headers kernel-tools kernel-tools-libs 
#sudo yum --enablerepo=elrepo-kernel install kernel-ml-headers kernel-ml-tools kernel-ml-tools-libs

  5. Check installed Kernels

    rpm -qa | grep kernel | sort

  6. Active Kernel without reboot (If need)

    sudo kexec -u
sudo kexec -l /boot/vmlinuz-5.4.278-1.el7.elrepo.x86_64 --initrd=/boot/initramfs-5.4.278-1.el7.elrepo.x86_64.img --reuse-cmdline
sudo systemctl kexec
@ShinJii89
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At that moment there's no RPMs in https://elrepo.org/linux/kernel/el7/x86_64/RPMS/ anyone know why? I can't install elrepo kernel on centos 7...

@lijiebio
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lijiebio commented Feb 6, 2025

At that moment there's no RPMs in https://elrepo.org/linux/kernel/el7/x86_64/RPMS/ anyone know why? I can't install elrepo kernel on centos 7...

Try this mirror: https://mirrors.coreix.net/elrepo-archive-archive/kernel/el7/x86_64/RPMS/

@JoseOlayo
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JoseOlayo commented Feb 10, 2025 •
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@lijiebio where do I need to paste that URL?

I'm not getting yum to find the kernel packages.

@ShinJii89
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@lijiebio where do I need to paste that URL?

I'm not getting yum to find the kernel packages.

Do yum install URL where URL is for example https://mirrors.coreix.net/elrepo-archive-archive/kernel/el7/x86_64/RPMS/kernel-lt-5.4.220-1.el7.elrepo.x86_64.rpm

@JoseOlayo
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Thank you so much @ShinJii89 I was about to loose my hair trying to upgrade that stuff

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