Ubuntu upgrade kernel to v4

Ubuntu 14.04 的内核过于老旧，项目需要升级内核，现在把更新方式记录下来，以便不时之需.

1. 查看当前内核版本

   $ uname -r
   3.19.0-21-generic
   

   1. 从kernel.ubuntu.com选择相应的内核版本文件下载到本地 bash $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-wily/linux-headers-4.4.0-040400_4.4.0-040400.201601101930_all.deb $ wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4-wily/linux-image-4.4.0-040400-generic_4.4.0-040400.201601101930_amd64.deb

2. 在下载目录执行安装

   $ sudo dpkg -i linux-headers-4.4.0*.deb linux-image-4.4.0*.deb 
   

   1. 更新GRUB后重启系统 bash $ sudo update-grub

3. 查看当前系统内核，删除旧的内核 ```bash $ uname -r 4.4.0-040400-generic

$ sudo apt-get autoremove linux-image-3.19.0-21-generic linux-headers-3.19.0-21 linux-headers-3.19.0-21-generic ```