I just installed ROS 2 Crystal from sources on Ubuntu 18.04. Everything went fine, but I would like to make a couple comments on the instructions: - In the `setup_sources` section [link](https://index.ros.org/doc/ros2/Linux-Install-Debians/#linux-install-debians-setup-sources) you should add the dependency on `lsb-release`. The first command would become: `sudo apt update && sudo apt install curl gnupg2 lsb-release` - In the `Install development tools and Ros tools ` section [link](https://index.ros.org/doc/ros2/Linux-Development-Setup/#install-development-tools-and-ros-tools) it looks like the pytest dependencies are needed only on Ubuntu 16.04. I'm on Ubuntu 18.04 and without them the build process prompted a lot of warnings about `pytest` missing and then failed while building the demos package. --- [Visit Topic](https://discourse.ros.org/t/ros-2-crystal-clemmys-call-for-testing-and-package-releases/7072/2) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: