You need background information about a package which is already installed
This is always interesting information
You can use the aptitude command with the show parameter.
e.g. aptitude show galternatives
This command delivers the following information:
Automatisch installiert: nein
Verwalter: Gustavo Noronha Silva <email@example.com>
Unkomprimierte Größe: 250k
Hängt ab von: python (< 2.5), python (>= 2.4), python-glade2
Kollidiert mit: gksu (< 0.8.0)
Beschreibung: graphical setup tool for the alternatives system
A GUI to help the system administrator to choose what program should provide a given service.
This is a graphical front-end to the update-alternatives program shipped with dpkg.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.