I'm about to install FreeBSD 12.1. I'm a longtime Ubuntu user, and I prefer to install apps via the command line. Just wondering.
The FreeBSD project has a very good Handbook covering most aspects of using the system.
For example, there is a chapter dedicated to Installing Applications: Packages and Ports.
In it, you will get to know that the command that is used for installation of pre-compiled 3rd party software is called
A FreeBSD package contains pre-compiled copies of all the commands for an application, as well as any configuration files and documentation. A package can be manipulated with the
pkg(8)commands, such as