CentOS7/8 installs Linux kernel 5+ or above
CentOS以稳定著称,稳定在另外一方面就是保守。所以CentOS7还在用3.10,CentOS8也才是4.18。而当前最新的Linux Kernel都更新到6.0 rc3了。其他较新的发行版都用上了5.10+的版本。本文简单介绍如何在CentOS7、8上直接安装5.1+以上版本的第三方内核。

使用teddysun编译的5.15 Kernel包
ELRepo Project 提供的内核版本一直都比较稳定,但是这个库 kernel-ml 总是在新的大版本出来以后就不再提供旧的版本。比如 kernel-ml 分支 5.15 到 5.15.13 以后就不再更新了。5.15 是最新的 LTS 版本,秋水大神继续编译 5.15.x 的最新版本,直到 5.15.x 不再更新为止。
CentOS7
执行以下三个命令后reboot重启。
wget https://dl.lamp.sh/kernel/el7/kernel-ml-5.15.63-1.el7.x86_64.rpm \ https://dl.lamp.sh/kernel/el7/kernel-ml-devel-5.15.63-1.el7.x86_64.rpm \ https://dl.lamp.sh/kernel/el7/kernel-ml-headers-5.15.63-1.el7.x86_64.rpm \ https://dl.lamp.sh/kernel/el7/kernel-ml-tools-5.15.63-1.el7.x86_64.rpm \ https://dl.lamp.sh/kernel/el7/kernel-ml-tools-libs-5.15.63-1.el7.x86_64.rpm \ https://dl.lamp.sh/kernel/el7/kernel-ml-tools-libs-devel-5.15.63-1.el7.x86_64.rpm yum localinstall kernel-ml-* -y --skip-broken
成功安装后,执行以下命令查看本机已经存在的内核列表:
awk -F\' '$1=="menuentry " {print i++ " : " $2}' /boot/grub2/grub.cfg
设置启动最新内核(一般最新安装的内核启动顺序为 0)
grub2-set-default 0 reboot
CentOS8
wget https://dl.lamp.sh/kernel/el8/kernel-ml-5.15.63-1.el8.x86_64.rpm \ https://dl.lamp.sh/kernel/el8/kernel-ml-headers-5.15.63-1.el8.x86_64.rpm \ https://dl.lamp.sh/kernel/el8/kernel-ml-core-5.15.63-1.el8.x86_64.rpm \ https://dl.lamp.sh/kernel/el8/kernel-ml-devel-5.15.63-1.el8.x86_64.rpm \ https://dl.lamp.sh/kernel/el8/kernel-ml-modules-5.15.63-1.el8.x86_64.rpm \ https://dl.lamp.sh/kernel/el8/kernel-ml-modules-extra-5.15.63-1.el8.x86_64.rpm yum localinstall kernel-ml-* --allowerasing -y
成功安装后,执行以下命令查看本机已经存在的内核启动顺序:
grub2-editenv list
一般情况下返回的就是最新版的内核信息。CentOS Stream 8 / Rocky Linux 8 / AlmaLinux 8 无需手动设置启动最新内核。
reboot
使用ELRepo更新最新稳定版内核
直接使用ELRepo Project 提供的内核,通过ELRepo安装最新稳定版的Linux Kerenl。当前是5.19.5。
CentOS7
yum install https://www.elrepo.org/elrepo-release-7.el7.elrepo.noarch.rpm -y yum --enablerepo=elrepo-kernel install kernel-ml -y && yum --enablerepo=elrepo-kernel install kernel-ml-devel -y grub2-set-default 0 reboot
CentOS8
yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm -y yum --enablerepo=elrepo-kernel install kernel-ml -y && yum --enablerepo=elrepo-kernel install kernel-ml-devel -y reboot
令人惊喜的是CentOS 9 Stream x64已经用上了5.14的内核,所以不必赘述。
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