melodic@melodic:~$ rosrun gazebo_ros gazebo 
[Err] [ClientConfig.cc:270] Parser error [4]
[Err] [ClientConfig.cc:270] Parser error [4]
[ INFO] [1664084193.895874589]: Finished loading Gazebo ROS API Plugin.
[ INFO] [1664084193.897075253]: waitForService: Service [/gazebo/set_physics_properties] has not been advertised, waiting...
[ INFO] [1664084194.304426040]: waitForService: Service [/gazebo/set_physics_properties] is now available.
[ INFO] [1664084194.323899951, 0.003000000]: Physics dynamic reconfigure ready.