Updated README.md

README.md

@@ -3,7 +3,7 @@
 Change in your ROS-node directory:
 
 ```sh
-cd ~catkin_ws/src
+cd ~/catkin_ws/src
 ```
 
 Clone the git-repository of the listener-node 
@@ -25,6 +25,11 @@ catkin_make
 source ~/catkin_ws/devel/setup.sh
 ```
 
+## Check if the Package is installed
+```
+rospack find ros_listener
+```
+
 ## Start Ros Kernel (optional)
 ```
 roscore &