1:查看当前安装的内核
dpkg -l|grep linux-image2:安装内核
sudo apt-get install linux-image-extra-3.13.0-74-generic3:卸载原有内核
sudo apt-get purge linux-image-3.13.0-xx-generic linux-image-extra-3.13.0-xx-generic4:更新grub
sudo update-grub
sudo reboot正文完
