1、
https://cloud.tencent.com/developer/article/1499892
解决CenOS7 不能直接升级内核的解决方法，
[root@xx ]# yum --enablerepo=elrepo-kernel install kernel-lt -y Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * elrepo: lon.mirror.rackspace.com * elrepo-kernel: lon.mirror.rackspace.com No package kernel-lt available. Error: Nothing to do
CentOS7 更新最新内核
内核下载地址：https://elrepo.org/linux/kernel/el7/x86_64/RPMS/
内核选择
kernel-lt（lt=long-term）长期有效
kernel-ml（ml=mainline）主流版本
安装过程
1.下载内核
wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-ml-5.2.4-1.el7.elrepo.x86_64.rpm
2.安装内核
rpm -ivh kernel-ml-5.2.4-1.el7.elrepo.x86_64.rpm
3.查看当前默认内核
# grub2-editenv list
saved_entry=CentOS Linux (3.10.0-327.28.3.el7.x86_64) 7 (Core)
4.查看所有内核启动 grub2
# awk -F \‘ ‘$1=="menuentry " {print i++ " : " $2}‘ /etc/grub2.cfg
0 : CentOS Linux (5.2.4-1.el7.elrepo.x86_64) 7 (Core)
1 : CentOS Linux (3.10.0-327.28.3.el7.x86_64) 7 (Core)
2 : CentOS Linux (3.10.0-327.22.2.el7.x86_64) 7 (Core)
3 : CentOS Linux (3.10.0-327.13.1.el7.x86_64) 7 (Core)
4 : CentOS Linux, with Linux 0-rescue-cd8c4444947b4b0b818457f51ded6591
5.修改为最新的内核启动
grub2-set-default ‘CentOS Linux (5.2.4-1.el7.elrepo.x86_64) 7 (Core)‘
6.再次查看内核
# grub2-editenv list
saved_entry=CentOS Linux (5.2.4-1.el7.elrepo.x86_64) 7 (Core)
7.重新启动
reboot
更新kernel-ml-headers
wget http://ftp.osuosl.org/pub/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-headers-5.2.4-1.el7.elrepo.x86_64.rpm
rpm -ivh kernel-ml-headers-5.2.4-1.el7.elrepo.x86_64.rpm
更新kernel-ml-devel
http://ftp.osuosl.org/pub/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-5.2.4-1.el7.elrepo.x86_64.rpm
rpm -ivh kernel-ml-devel-5.2.4-1.el7.elrepo.x86_64.rpm
(adsbygoogle = window.adsbygoogle || []).push({});