一、用命令：

1. Linux Kernel Source Code:

   apt-get source linux-source-3.2.0
   

   Where can I find the source code for the Ubuntu Kernel?

2. Ubuntu Source Code:

   Ubuntu archive

3. Specific Software Source Code:

   sudo apt-get build-dep $package
   

   where package is the program/package's source code you want to adopt.

   then type:

   apt-get source $package
   

   to get the source for that package.

   For instance：

4. sudo apt-get build-dep abiword
   apt-get source abiword
   

二、官网下载：

    http://cdimage.ubuntu.com/releases/18.04/release/source/