Centos 8.2 升级内核通过elrepo源的方法
作者：娇小赤雅
这篇文章主要介绍了Centos 8.2 升级内核通过elrepo源,本文给大家介绍的非常详细，对大家的学习或工作具有一定的参考借鉴价值，需要的朋友可以参考下
一、Centos 8.2 升级内核通过elrepo源
地址
查看linux内核版本
[root@localhost ~]# cat /proc/version Linux version 4.18.0-193.el8.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 8.3.1 20191121 (Red Hat 8.3.1-5) (GCC)) #1 SMP Fri May 8 10:59:10 UTC 2020 [root@localhost ~]# uname -a Linux localhost.localdomain 4.18.0-193.el8.x86_64 #1 SMP Fri May 8 10:59:10 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
查看yum中可升级的内核版本
[root@localhost ~]# yum list kernel --showduplicates CentOS Linux 8 - BaseOS 1.2 MB/s | 4.6 MB 00:03 CentOS-8 - Extras 4.9 kB/s | 11 kB 00:02 Last metadata expiration check: 0:00:01 ago on Sat 15 Oct 2022 02:58:01 PM CST. Installed Packages kernel.x86_64 4.18.0-193.el8 @anaconda Available Packages kernel.x86_64 4.18.0-348.el8 baseos kernel.x86_64 4.18.0-348.2.1.el8_5 baseos kernel.x86_64 4.18.0-348.7.1.el8_5 baseos
注意：可能要配置yum原（去找找吧）当然在我 二进制安装kubernetes 最后标题报错有配置yum原
导入ELRepo软件仓库的公共秘钥
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
CentOS 8 系统安装ELRepo
[root@localhost ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org [root@localhost ~]# yum install https://www.elrepo.org/elrepo-release-8.el8.elrepo.noarch.rpm Last metadata expiration check: 0:05:56 ago on Sat 15 Oct 2022 02:58:01 PM CST. elrepo-release-8.el8.elrepo.noarch.rpm 6.7 kB/s | 13 kB 00:01 Dependencies resolved. ================================================================================================================== Package Architecture Version Repository Size ================================================================================================================== Installing: elrepo-release noarch 8.3-1.el8.elrepo @commandline 13 k Transaction Summary ================================================================================================================== Install 1 Package Total size: 13 k Installed size: 5.0 k Is this ok [y/N]: y Downloading Packages: Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : elrepo-release-8.3-1.el8.elrepo.noarch 1/1 Verifying : elrepo-release-8.3-1.el8.elrepo.noarch 1/1 Installed products updated. Installed: elrepo-release-8.3-1.el8.elrepo.noarch Complete!
查看ELRepo提供的内核版本
内核版本简写说明
kernel-lt(lt=long-term)长期有效
kernel-ml(ml=mainline)主流版本
[root@localhost ~]# yum --disablerepo="*" --enablerepo="elrepo-kernel" list available ELRepo.org Community Enterprise Linux Kernel Repository - el8 31 kB/s | 2.1 MB 01:08 Last metadata expiration check: 0:00:01 ago on Sat 15 Oct 2022 03:06:34 PM CST. Available Packages bpftool.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-lt.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-core.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-devel.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-doc.noarch 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-headers.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-modules.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-modules-extra.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-tools.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-tools-libs.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-lt-tools-libs-devel.x86_64 5.4.217-1.el8.elrepo elrepo-kernel kernel-ml.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-core.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-devel.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-doc.noarch 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-headers.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-modules.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-modules-extra.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-tools.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-tools-libs.x86_64 6.0.1-1.el8.elrepo elrepo-kernel kernel-ml-tools-libs-devel.x86_64 6.0.1-1.el8.elrepo elrepo-kernel perf.x86_64 6.0.1-1.el8.elrepo elrepo-kernel python3-perf.x86_64 6.0.1-1.el8.elrepo elrepo-kerne
安装长期支持的内核
[root@localhost ~]# yum --enablerepo=elrepo-kernel install kernel-lt.x86_64 kernel-lt-devel.x86_64 ELRepo.org Community Enterprise Linux Repository - el8 5.4 kB/s | 259 kB 00:47 ELRepo.org Community Enterprise Linux Kernel Repository - el8 353 kB/s | 2.1 MB 00:06 Last metadata expiration check: 0:00:01 ago on Sat 15 Oct 2022 03:14:19 PM CST. Dependencies resolved. ================================================================================================================== Package Architecture Version Repository Size ================================================================================================================== Installing: kernel-lt x86_64 5.4.217-1.el8.elrepo elrepo-kernel 75 k kernel-lt-devel x86_64 5.4.217-1.el8.elrepo elrepo-kernel 13 M Installing dependencies: kernel-lt-core x86_64 5.4.217-1.el8.elrepo elrepo-kernel 28 M kernel-lt-modules x86_64 5.4.217-1.el8.elrepo elrepo-kernel 25 M Transaction Summary ================================================================================================================== Install 4 Packages Total download size: 66 M Installed size: 136 M Is this ok [y/N]: y Downloading Packages: (1/4): kernel-lt-5.4.217-1.el8.elrepo.x86_64.rpm 69 kB/s | 75 kB 00:01 (2/4): kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64.rpm 1.2 MB/s | 13 MB 00:10 (3/4): kernel-lt-core-5.4.217-1.el8.elrepo.x86_64.rpm 719 kB/s | 28 MB 00:40 (4/4): kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64.rpm 339 kB/s | 25 MB 01:14 ------------------------------------------------------------------------------------------------------------------ Total 371 kB/s | 66 MB 03:02 Running transaction check Transaction check succeeded. Running transaction test Transaction test succeeded. Running transaction Preparing : 1/1 Installing : kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 1/4 Running scriptlet: kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 1/4 Installing : kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 2/4 Running scriptlet: kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 2/4 Installing : kernel-lt-5.4.217-1.el8.elrepo.x86_64 3/4 Installing : kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 4/4 Running scriptlet: kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 4/4 Running scriptlet: kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 4/4 Running scriptlet: kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 4/4 Verifying : kernel-lt-5.4.217-1.el8.elrepo.x86_64 1/4 Verifying : kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 2/4 Verifying : kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 3/4 Verifying : kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 4/4 Installed products updated. Installed: kernel-lt-5.4.217-1.el8.elrepo.x86_64 kernel-lt-core-5.4.217-1.el8.elrepo.x86_64 kernel-lt-devel-5.4.217-1.el8.elrepo.x86_64 kernel-lt-modules-5.4.217-1.el8.elrepo.x86_64 Complete!
查看系统可用内核，并设置启动项
sudo awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg有知道的可以评论留言下，非常感谢！[8 不好使]
指定开机启动内核版本
grub2-set-default 0
生成 grub 配置文件
[root@localhost ~]# grub2-set-default 0 [root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg Generating grub configuration file ... done
重启
reboot
验证
cat /proc/version uname -r
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