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Centos7升级内核

 

更新前,内核版本为:

uname -r  
3.10.0-327.10.1.el7.x86_64

升级的方法:

1、导入key

rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org  

2、安装elrepo的yum源

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm  

3、替换国内elrepo源

mv  /etc/yum.repos.d/elrepo.repo  /etc/yum.repos.d/elrepo.repo.bak
vi  /etc/yum.repos.d/elrepo.repo
### Name: ELRepo.org Community Enterprise Linux Repository for el7
### URL: https://mirrors.ustc.edu.cn/elrepo/

[elrepo]
name=ELRepo.org Community Enterprise Linux Repository - el7
baseurl=https://mirrors.ustc.edu.cn/elrepo/elrepo/el7/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0

[elrepo-testing]
name=ELRepo.org Community Enterprise Linux Testing Repository - el7
baseurl=https://mirrors.ustc.edu.cn/elrepo/testing/el7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0

[elrepo-kernel]
name=ELRepo.org Community Enterprise Linux Kernel Repository - el7
baseurl=https://mirrors.ustc.edu.cn/elrepo/kernel/el7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0

[elrepo-extras]
name=ELRepo.org Community Enterprise Linux Extras Repository - el7
baseurl=https://mirrors.ustc.edu.cn/elrepo/extras/el7/$basearch/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org
protect=0

4、安装内核

yum --enablerepo=elrepo-kernel install  kernel-ml-devel kernel-ml

当前为4.14.12:

===================================================================================================
 Package                      架构         版本                          源                   大小
===================================================================================================
正在安装:
 kernel-ml                    x86_64       4.14.12-1.el7.elrepo          elrepo-kernel        43 M
 kernel-ml-devel              x86_64       4.14.12-1.el7.elrepo          elrepo-kernel        11 M

4、查看默认启动顺序

awk -F\' '$1=="menuentry " {print $2}' /etc/grub2.cfg
CentOS Linux (4.14.12-1.el7.elrepo.x86_64) 7 (Core)
CentOS Linux (3.10.0-693.11.6.el7.x86_64) 7 (Core)
CentOS Linux (3.10.0-693.el7.x86_64) 7 (Core)
CentOS Linux (0-rescue-86c958f6cabe420a9e1d369335737991) 7 (Core)
 

5、设置默认的启动内核

grub2-set-default "CentOS Linux (4.14.12-1.el7.elrepo.x86_64) 7 (Core)"

配置默认内核
验证是否修改成功:

 grub2-editenv list
saved_entry=CentOS Linux (4.14.12-1.el7.elrepo.x86_64) 7 (Core)

原文链接:Centos7升级内核,转载请注明来源!

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