centos install a newer version of kernel methods

Sometimes because the system kernel bug we have to install the new version of the kernel to solve the problem, there are several ways

Source compiler
Use compiled package

More convenient way to use the package, while some of the dependency problems automatically help us deal

Add yum source

 
         rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org 
        
         rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

Enable repo

You can modify the file
/etc/yum.repos.d/elrepo.repo reference to the following

           
         [elrepo-kernel] 
        
         name=ELRepo.org Community Enterprise Linux Kernel Repository - el7 
        
         baseurl = http: //elrepo.org/linux/kernel/el7/$basearch/ 
        
          http://mirrors.coreix.net/elrepo/kernel/el7/$basearch/ 
        
          http://mirror.rackspace.com/elrepo/kernel/el7/$basearch/ 
        
          http://repos.lax-noc.com/elrepo/kernel/el7/$basearch/ 
        
          http://mirror.ventraip.net.au/elrepo/kernel/el7/$basearch/ 
        
         mirrorlist=http://mirrors.elrepo.org/mirrors-elrepo-kernel.el7 
        
         enabled=1 
        
         gpgcheck=1 
        
         gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-elrepo.org 
        
         protect=0

 
         yum --disablerepo="*" --enablerepo="elrepo-kernel" list available 
        

Refresh cache

 
         yum clean dbcache 
        
         yum makecache

installation

 
         yum install -y kernel-lt or yum install -y kernel-ml 
        

Modify grub boot

Modify the file
/ etc / default / grub and set GRUB_DEFAULT = 0, so that the first page of the kernel initialization GRUB as the default kernel.

           
         GRUB_TIMEOUT=1 
        
         GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)" 
        
         GRUB_DEFAULT=0 
        
         GRUB_DISABLE_SUBMENU=true 
        
         GRUB_TERMINAL_OUTPUT="console" 
        
         GRUB_CMDLINE_LINUX="crashkernel=auto noibrs idle=halt net.ifnames=0 console=tty0 console=ttyS0,115200n8" 
        
         GRUB_DISABLE_RECOVERY="true"

Re-create the kernel configuration

 
         grub2 - mkconfig - the / boot / grub2 / grub. cfg

effect

 
         grub2 - mkconfig - the / boot / grub2 / grub. cfg 
        
         Generating grub configuration file ... 
        
         Found linux image: /boot/vmlinuz-5.1.5-1.el7.elrepo.x86_64 
        
         Found initrd image: /boot/initramfs-5.1.5-1.el7.elrepo.x86_64.img 
        
         Found linux image: /boot/vmlinuz-4.4.180-2.el7.elrepo.x86_64 
        
         Found initrd image: /boot/initramfs-4.4.180-2.el7.elrepo.x86_64.img 
        
         Found linux image: /boot/vmlinuz-3.10.0-957.5.1.el7.x86_64 
        
         Found initrd image: /boot/initramfs-3.10.0-957.5.1.el7.x86_64.img 
        
         Found linux image: /boot/vmlinuz-3.10.0-957.1.3.el7.x86_64 
        
         Found initrd image: /boot/initramfs-3.10.0-957.1.3.el7.x86_64.img 
        
         Found linux image: /boot/vmlinuz-3.10.0-862.el7.x86_64 
        
         Found initrd image: /boot/initramfs-3.10.0-862.el7.x86_64.img 
        
         Found linux image: /boot/vmlinuz-0-rescue-20181212155109274552296824485474 
        
         Found initrd image: /boot/initramfs-0-rescue-20181212155109274552296824485474.img 
        
         done

Reboot the system

reboot

View results

 
         uname -a 
        
         Linux iZ2zeg7uro1snhd9wqmp2oZ 5.1.5-1.el7.elrepo.x86_64 #1 SMP Sat May 25 16:10:51 EDT 2019 x86_64 x86_64 x86_64 GNU/Linux

Reference material

https://elrepo.org/tiki/kernel-lt