I am using Ubuntu 14.04.1. From the day that which i have installed it, there has been an error message of the following type appears:
failure to download extra data files
the following packages requested additional data downloads after package information, > but the data could not be downloaded or could not be processed
flashplugin-installer
the download will be attempted agin latter, or you can try the download again now. Running this command requires an active internet connection.
sudo apt-get update
and thensudo apt-get install flashplugin-installer
.