Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Revision history [back]

I also experience the same issue when following the ROS2 installation guide. Under the heading "Install development tools and ROS tools" the author provides several lines of commands to install dependent packages. Turns out copy and pasting the entire commands will not install all of them, rather you have to copy and paste each individual section.

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.