一、查看当前系统版本及内核信息
root@ubuntu:~# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 14.04.1 LTS
Release:	14.04
Codename:	trusty
root@ubuntu:~# uname -a
Linux ubuntu 3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
root@ubuntu:~# uname -r
3.13.0-32-generic
二、升级内核方法
1. 到http://kernel.ubuntu.com/~kernel-ppa/mainline/选择合适的内核安装包
2. X86硬件架构64位操作系统应选择AMD64
3. 下载3个内核deb安装文件
   #Ubuntu内核网站里每个版本的内核有很多安装包，在此我们选择必须的3个安装包即可。    
    wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.1/linux-headers-4.13.1-041301_4.13.1-041301.201709100232_all.deb
    wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.1/linux-headers-4.13.1-041301-generic_4.13.1-041301.201709100232_amd64.deb
    wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13.1/linux-image-4.13.1-041301-generic_4.13.1-041301.201709100232_amd64.deb
4. 安装deb包
   sudo dpkg -i *.deb
三、更新grub，重启验证
root@ubuntu:~# update-grub
root@ubuntu:~# reboot
root@ubuntu:~# uname -sr
#Ubuntu内核已经升级为Linux 4.13.1-041301-generic版本
Linux 4.13.1-041301-generic