To install the gnupg cryptographic software on a FreeBSD system, you can use the pkg command.
The pkg command is the package manager for FreeBSD and allows you to install, update, and remove packages on your system.
To install gnupg, use the following command:
pkg install gnupg
This will install the gnupg package and any dependencies that are required.
Alternatively, you can also install gnupg from the FreeBSD ports tree using the make command. To do this, first navigate to the directory where the ports tree is located. On most systems, this is /usr/ports/security/gnupg.
Then, use the make install clean command to install gnupg from the ports tree:
cd /usr/ports/security/gnupg make install clean