The ROS Wiki is for ROS 1. Are you using ROS 2 (Humble, Iron, or Rolling)? Check out the ROS 2 Project DocumentationPackage specific documentation can be found on index.ros.org
rospack tutorial:
Navigating the ROS Filesystem
Part of the larger series of ROS Tutorials
Wiki: rospack/Tutorials (last edited 2014-01-04 01:18:48 by TullyFoote)