In the previous chapter, we used the package manager to set up the ROS-1 environment, desktop, pull keys, and startup installation. ROS-2 is no different and the same method can be followed (but obviously using different setup keys and commands). However, unlike ROS-1, where we followed the Debian package installation technique, we will try the source installation technique in this chapter for installing ROS-2, although you can use the Debian package installation technique as well. It is best to build ROS-2 manually on Linux (that is, via source installation) so that we can add any new changes or releases directly into the package and compile them. Let's get started with the source installation.