我要评论一、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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