错误命令行：

root@ubuntu:/etc/apt# apt install vim
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:
 vim : Depends: vim-common (= 2:7.4.052-1ubuntu3.1) but 2:8.0.1453-1ubuntu1 is to be installed
E: Unable to correct problems, you have held broken packages.

原因
已有安装过vim，但没有安装成功

解决方案
先执行 sudo apt-get remove vim-common 卸载vim-common
再进行安装vim，执 sudo apt-get install vim