4.3 How to know what packages may be upgraded

apt-show-versions is a program that shows what packages in the system may be updated and several useful information. The -u option displays a list of upgradeable packages:

     $ apt-show-versions -u    
     libeel0/unstable upgradeable from 1.0.2-5 to 1.0.2-7
     libeel-data/unstable upgradeable from 1.0.2-5 to 1.0.2-7