1.添加更新源 stretch-backports

sudo apt-get -t stretch-backports upgrade

或者阿里云添加此源

2.搜索软件包

sudo apt-cache search linux-image

3.安装新版内核

sudo apt-get -t stretch-backports install linux-image-4.19.0-0.bpo.5-amd64 linux-headers-4.19.0-0.bpo.5-amd64

4.如果依赖包未安装那么指定  -t stretch-backports 来安装响应版本依赖包

sudo apt-get install -t stretch-backports packagename

5.出现minicore错误请忽略