CentOS 7.6.1810增加新内核版本_centos linux release 7.6.1810

为了方便，先切换到root用户

$ su
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1. 查看当前内核版本

# uname -a
Linux localhost.localdomain 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
# cat /etc/redhat-release 
CentOS Linux release 7.6.1810 (Core) 
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2. 更新yum仓库源

# yum -y update
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3. 导入并安装elrepo仓库

# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
# rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
Retrieving http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
Preparing...                          ################################# [100%]
Updating / installing...
   1:elrepo-release-7.0-3.el7.elrepo  ################################# [100%]
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4. check目前可用的内核包

# yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 1. elrepo-kernel: mirror.rackspace.com
elrepo-kernel                                                                                                                                                         | 3.0 kB  00:00:00     
elrepo-kernel/primary_db                                                                                                                                              | 2.0 MB  00:00:01     
Available Packages
elrepo-release.noarch                                                                         7.0-5.el7.elrepo                                                                  elrepo-kernel
kernel-lt.x86_64                                                                              5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-lt-devel.x86_64                                                                        5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-lt-doc.noarch                                                                          5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-lt-headers.x86_64                                                                      5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-lt-tools.x86_64                                                                        5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-lt-tools-libs.x86_64                                                                   5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-lt-tools-libs-devel.x86_64                                                             5.4.162-1.el7.elrepo                                                              elrepo-kernel
kernel-ml.x86_64                                                                              5.15.5-1.el7.elrepo                                                               elrepo-kernel
kernel-ml-devel.x86_64                                                                        5.15.5-1.el7.elrepo                                                               elrepo-kernel
kernel-ml-doc.noarch                                                                          5.15.5-1.el7.elrepo                                                               elrepo-kernel
kernel-ml-headers.x86_64                                                                      5.15.5-1.el7.elrepo                                                               elrepo-kernel
kernel-ml-tools.x86_64                                                                        5.15.5-1.el7.elrepo                                                               elrepo-kernel
kernel-ml-tools-libs.x86_64                                                                   5.15.5-1.el7.elrepo                                                               elrepo-kernel
kernel-ml-tools-libs-devel.x86_64                                                             5.15.5-1.el7.elrepo                                                               elrepo-kernel
perf.x86_64                                                                                   5.15.5-1.el7.elrepo                                                               elrepo-kernel
python-perf.x86_64                                                                            5.15.5-1.el7.elrepo                                                               elrepo-kernel
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5. 安装最新版内核

# yum --enablerepo=elrepo-kernel install kernel-ml
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.bfsu.edu.cn
 * elrepo: hkg.mirror.rackspace.com
 * elrepo-kernel: hkg.mirror.rackspace.com
 * extras: mirror.lzu.edu.cn
 * updates: mirror.lzu.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package kernel-ml.x86_64 0:5.15.5-1.el7.elrepo will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=============================================================================================================================================================================================
 Package                                   Arch                                   Version                                                Repository                                     Size
=============================================================================================================================================================================================
Installing:
 kernel-ml                                 x86_64                                 5.15.5-1.el7.elrepo                                    elrepo-kernel                                  55 M

Transaction Summary
=============================================================================================================================================================================================
Install  1 Package

Total download size: 55 M
Installed size: 252 M
Is this ok [y/d/N]: y
Downloading packages:
kernel-ml-5.15.5-1.el7.elrepo.x86_64.rpm                                                                                                                              |  55 MB  00:00:53     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
  Installing : kernel-ml-5.15.5-1.el7.elrepo.x86_64                                                                                                                                      1/1 
  Verifying  : kernel-ml-5.15.5-1.el7.elrepo.x86_64                                                                                                                                      1/1 

Installed:
  kernel-ml.x86_64 0:5.15.5-1.el7.elrepo                                                                                                                                                     

Complete!
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6. 重启后可手动选择内核版本

# reboot
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