General Practice
1. Update sudo apt-get update first
2. sudo apt-get install Flashplugin-installer
This time I was stuck here in downloading. Helpless change of way
1. Download http://archive.canonical.com/pool/partner/a/adobe-flashplugin/adobe-flashplugin_20151228.1.orig.tar.gz
2. Extract
3. Copy the below i386 under Libpepflashplayer.so to the Firefox installation directory under browser under the plugins
It's not going to work out again, because I can't wait to finish the card.
Execute dpkg--configure--pending
The Apt-get prompt is already installed but the PPT still can't be opened
Execute sudo dpkg-reconfigure flashplugin-installer
At this point, the graphical interface prompts for the download. tar.gz position enter the last hint
Installing from local file/home/ubuntu/downloads//adobe-flashplugin_20151228.1.orig.tar.gz
Installing from local file/home/ubuntu/downloads//adobe-flashplugin_20151228.1.orig.tar.gz
Flash Plugin installed.
Flash Plugin installed.
This time has finally been finished.
Ubuntu Adobe Flash Player installation