The distfetch module of FreeBSD bsdinstall(8)

Produced by executing (as root): env BSDINSTALL_DISTSITE=ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/9.1-RELEASE BSDINSTALL_DISTDIR=/tmp DISTRIBUTIONS=”base.txz dict.txz doc.txz games.txz ports.txz” /usr/libexec/bsdinstall/distfetch