Update getting_started.rst

doc/getting_started/getting_started.rst

@@ -12,6 +12,15 @@ Binary packages
 The ros2_control framework is released for ROS 2 {DISTRO}.
 To use it, you have to install ``ros-{DISTRO}-ros2-control`` and ``ros-{DISTRO}-ros2-controllers`` packages.
 
+You can run the following commands to install the binary packages
+  .. code-block:: shell
+
+    sudo apt install ros-{DISTRO}-ros2-control
+    sudo apt install ros-{DISTRO}-ros2-controllers
+
+
+
+
 Building from Source
 ---------------------------