所以我试图设置我的计算机进行开发。我安装了 ubuntu 14.04 LTS。我想编写一个 hello-world 程序。但是我无法编译它。经过一番搜索，我尝试了sudo apt-get install build-essential，它抱怨：
>sudo apt-get install build-essential
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies: …