Configuration tool for FreeBSD. It is also the program that deals with the installation process.

Using ncurses, sysinstall provides an user interface that is easy to understand and use. the sysinstall-utility is good for configuration when the user is a newcomer and does not know how to use it the hard way. Sysinstall should be used with caution, since it has a tendency to screw up things without warning, and it might also overwrite critical file such as /etc/rc.conf and /etc/passwd.