I think, you are referring to the binary program name included in the package. I use this technique to find this:
dpkg -L <package-name> in a terminal, it will display all files installed by that package, then you can recognize the binary program names by looking at their location. Usually programs are installed in
/usr/bin directory or
Let's see an example:
anwar@edubuntu-lenovo:~$ dpkg -L gnome-screenshot
Note that, the program name of gnome-screenshot package is
Is there any standard way to know the
<packageName> for the desired program?
Sometimes the terminal can tell your the package name required to be installed to have a desired program. It happens when the program is in Standard repository and you have enabled those repository.
For example, If I type
gnome-documents when no such package is installed, the terminal will tell be this:
The program 'gnome-documents' is currently not installed. You can install it by typing:
sudo apt-get install gnome-documents
But, in this case, I should at least know the program name