如何“在你的sources.list 中加入一些‘源’URI”？

Question

机器：东芝MK1646GSX，intel atom CPU@1.60Ghz，2048Mb。32 位。

操作系统：LINUX Lite 3.8

我试图安装 PIDGIN 依赖项：

 ~> sudo apt-get build-dep pidgin

然后我得到了这个而不是安装build-dep：

Reading package lists... Done
E: You must put some 'source' URIs in your     sources.list

所以我搜索了，我发现消息来源说我应该rm -rf the sources.list，然后apt-get update列表会自己创建。结果并不好，就像我所期望的那样，该列表没有自行创建。之后，我创建了一个具有相同内容的新列表，我试图确保每一行都拥有它deb-src。所有的行都是正确的。但是当我尝试安装build-dep. 该怎么办？

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从 justpaste 链接复制的 sources.list：

###### Ubuntu Main Repos
deb http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu xenial main restricted universe multiverse


###### Ubuntu Update Repos
deb http://archive.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu xenial-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu xenial-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu xenial-proposed main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu xenial-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse
# deb-src http://archive.ubuntu.com/ubuntu xenial-backports main restricted universe multiverse


###### Ubuntu Partner Repos
deb http://archive.canonical.com/ xenial partner
# deb-src http://archive.canonical.com/ xenial partner

Answer 1

取消注释中的deb-src行/etc/apt/sources.list：

sudo sed -i 's/# deb-src/deb-src/' /etc/apt/sources.list
sudo apt update