This error could be caused by required additional software packages which are missing or not installable. Furthermore there could be a conflict between software packages which are not allowed to be installed at the same time.
details:
The following packages have unmet dependencies:
flashplugin-installer:
我怎样才能解决这个问题？
答案1
要安装flash插件在 Ubuntu 上安装软件包，打开 Ubuntu 软件中心，搜索“flash”（不带引号）。安装后，重启你的网络浏览器，Flash 应该就可以正常工作了！
答案2
尝试使用aptitude：
sudo aptitude install flashplugin-installer
aptitude如果您的机器上尚未安装sudo apt-get install aptitude。
希望这可以帮助。