arm开发板ucbietruck的debian安装到nand里由于更新了内核导致系统崩溃，所以要排除内核更新。

apt-mark hold linux-image-sun7i
apt-mark hold linux-headers-sun7i

hold/排除(以下三条命令任选一条均可)

sudo apt-mark hold package_name
or
echo "package_name hold" | sudo dpkg --set-selections
or
sudo aptitude hold package_name

查看哪些软件包被hold

dpkg --get-selections | grep hold

解除hold(以下三条命令任选一条均可)

sudo apt-mark unhold package_name
or
echo "package_name install" | sudo dpkg --set-selections
or
sudo aptitude hold package_name

参考：https://tecadmin.net/exclude-packages-from-apt-upgrade/