我上周刚安装了 Ubuntu 18.04，这意味着我没有从 16.04 升级，而是格式化了硬盘并安装了 18.04。
我正在尝试安装texlive-full，但每当我使用：
sudo apt install texlive-full
这就是我得到的：
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.
texlive-full …