Is there a way to know which GTK version is installed using the command line?
Solution 1:
apt-cache policy libgtk2.0-0 libgtk-3-0 (optionally pipe to grep Installed)
or
dpkg -l libgtk2.0-0 libgtk-3-0
Solution 2:
Try this:
dpkg -l libgtk2.0-0 libgtk-3-0
This will give info for both GTK 2 and 3.
Solution 3:
--get-selections will show you the installed packages
dpkg --get-selections | grep gtk