1、導入密鑰

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

2、添加庫

# Centos 7
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
# Centos 6
rpm -Uvh http://www.elrepo.org/elrepo-release-6-8.el6.elrepo.noarch.rpm

3、更新內核

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

4、查詢所有內核列表

# Centos 7
grep -oP "(?<=^menuentry \‘)[^\‘]+" /etc/grub2.cfg 
# Centos 6
grep -oP ‘(?<=title ).*‘ /boot/grub/grub.conf

5、修改默認啟動內核

# Centos 7
grub2-set-default "CentOS Linux (4.12.4-1.el7.elrepo.x86_64) 7 (Core)"
# Centos 6
sed -i ‘s/^default=.*/default=0/g‘ /boot/grub/grub.conf

6、重啟

reboot

7、查看內核版本

uname -r

本文出自 “baby神” 博客，請務必保留此出處http://babyshen.blog.51cto.com/8405584/1956789

cnetos 6/7 yum升級最新內核