We faced with some question when using Ubuntu :
    How can I know a pakages or softwares has been installed on Ubuntu ?  
    How can show all pakages of a softwares ?
    How can I list all pakages , softwares that were installed ?
The answer is : Using dpkg  to resolve the above issues 

 If you want to list all pakages just type :

sudo dpkg --get-selections
But you realize that it's a huge list of pakages, you hardly to find some specific pakages you want, just combine dpkg with grep like the following command :
  sudo dpkg --get-selections | grep your_package
You will get what you want. Have a nice day ! ^^