Install Adobe Reader/Flash on Ubuntu 12.04

1. To install Adobe Flash/Reader, enable canonical partner repository by running below command

$ sudo apt-add-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"

2. Update the system and install Adobe Flash Player & Adobe Reader

$ sudo apt-get update
$ sudo apt-get install flashplugin-installer acroread

I hope it may helpful to install Adobe Flash Player & Adobe Reader on ubuntu 12.04 without any issues.