Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package vim
首先 apt-get update 更新同步 /etc/apt/sources.list 和 /etc/apt/sources.list.d 中列出的源的索引,这样才能获取到最新的软件包.
原文：http://www.cnblogs.com/xqnq2007/p/7921489.html