https://www.msl.la/tag/el7/ https://www.msl.la/archives/156/ 2021-02-21T16:39:00+08:00 此方法适用于CENTOS7-8更新前，内核版本为:uname -r 3.10.0-327.10.1.el7.x86_64升级的方法：导入keyrpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org安装elrepo的yum源rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm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)设置默认的启动内核grub2-set-default "CentOS Linux (4.14.12-1.el7.elrepo.x86_64) 7 (Core)" grub2-mkconfig -o /boot/grub2/grub.cfg 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)