centos 6.5 升级内核到3.12

   29  yum update -y
   30  yum upgrade -y
   31  yum install gcc gcc-c++ xz bc ncurses-devel
   32  yum install hmaccalc zlib-devel binutils-devel elfutils-libelf-devel
   33  cd /usr/local/
   34  ll
   35  cd src
   36  ll
   37  wget https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.12.17.tar.xz
   38   ll
   39  tar zxvf linux-3.12.17.tar.xz 
   40  tar -xf linux-3.12.17.tar.xz 
   41  ll
   42  sudo yum groupinstall "Development Tools" # 一口气安装编译时所需的一切工具
   43  sudo yum install hmaccalc zlib-devel binutils-devel elfutils-libelf-devel #创建 CentOS-6 内核时需要它们
   44  uname -r
   45  ll
   46  cd linux-3.12.17
   47  ll
   48  cp /boot/config-2.6.32-431.el6.x86_64 .config
   49  sh -c ‘yes "" | make oldconfig‘
   50  sudo make -j18 bzImage
   51  sudo make -j18 modules
   52  sudo make -j8 modules_install
   53  sudo make install
   54  vim /etc/grub.conf 
   55  sudo reboot