(1)查看系统已经安装的内核

dpkg --get-selections | grep linux-image

dpkg -l|grep linux-image

(2)卸载内核

sudo apt-get purge/remove linux-image-2.6.32-21-generic

sudo apt-get purge linux-image-x.xx.x-xx-generic linux-image-extra-x.xx.x-xx-generic

(3)查看当前运行内核

uname -r/-a

(4)升级内核

sudo apt-get update

sudo apt-get upgrade

(5)安装内核

查看可安装内核：

sudo apt-cache search linux-image

安装内核：

sudo apt-get install linux-image-2.6.32-21-generic

安装3.13.0-24-generic内核文件：

sudo apt-get install linux-image-extra-x.xx.x-xx-generic

(6)更新grub系统引导文件：

sudo update-grub