gazebo2 along with ROS indigo get around gz tool missing
I use specific version ROS, indigo, and I see in the tutorial that it is better off working with gazebo2.
But it seems gazebo2 lack some functionalities compared to higher verison, like 7
I see the tutorial mentions gz tool tons of time, for example:
gz topic -e /gazebo/default/box/link/my_contact
How can I get around this command using gazebo2? It seems the tutorial version is 7+.
Sorry, I am new here, not familiar. thanks for your attention.