如何下载Ubuntu命令对应的源码

首先安装dpkg-dev：

apt-get install dpkg-dev 

设置源，将原来的源复制，但把deb改为deb-src：

#vim /etc/apt/sources.list

deb http://mirrors.163.com/ubuntu/ lucid main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ lucid-security main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ lucid-updates main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ lucid main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ lucid-security main restricted universe multiverse

deb-src http://mirrors.163.com/ubuntu/ lucid-updates main restricted universe multiverse

 并执行apt-get update

得到命令的全路径：

# which ascii

/usr/bin/ascii

 查找命令所在的包：

 # dpkg -S /usr/bin/ascii

ascii: /usr/bin/ascii

 下载包的源码：

# apt-get source ascii

当前目录下面既可以看到源码已经下载 

 # ls

ascii-3.8  ascii_3.8-4.diff.gz  ascii_3.8-4.dsc  ascii_3.8.orig.tar.gz