Fundamentals of ROS
Understanding the basic working of ROS and its terminology can help you understand existing ROS applications and build your own. This section will teach you important concepts that we are going to use in the upcoming chapters. If you find a topic missed in this chapter, it will be covered in a corresponding later chapter.
There are three different concepts in ROS. Let's take a look at them.
The filesystem level
The filesystem level explains how ROS files are organized on the hard disk:
Figure 6: The ROS filesystem level
As you can see from the figure, the filesystem in ROS can be categorized mainly as metapackages, packages, package ...
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