It is time for you to practice what you have learned until now. In the upcoming sections, you will see examples for you to practice along with the creation of packages, using nodes, using Parameter Server, and moving a simulated robot with Turtlesim.
We have command-line tools to navigate through the filesystem. We are going to explain the most used ones.
To get information and move to packages and stacks, we will use rospack, rosstack, roscd, and rosls.
We use rospack and rosstack to get information about packages and stacks, the path, the dependencies, and so on.
For example, if you want to find the path of the turtlesim package, you will use the following command:
$ rospack find turtlesim
You will then obtain the following output:
/opt/ros/hydro/share/turtlesim
The same thing happens with the metapackages that you have installed in the system. An example of this is as follows:
$ rosstack find ros_comm
You will obtain the path for...