I am new on linux platform. I have given these codes while installing adobe reader
sudo add-apt-repository "deb http://archive.canonical.com/ precise partner" sudo apt-get update sudo apt-get install acroread
Unfortunately, adobe reader didnt get installed.(I tried many times,but to no success.) Then,
sudo add-apt-repository -r "deb http://archive.canonical.com/ precise partner" sudo apt-get update
but in the end of the update phenomenon , there is some error message, and hopefully ,
Failed to download.. something like that.
after that I tried some regular software updates , but in the end , I am getting a warning sign in my taskbar, indicating the below,
The update information is outdated. This may be caused by network problems or may be caused by a repository that is no longer available. Please update manually by clicking this icon.