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FreeBSD Update is a binary update mechanism for FreeBSD's “base” distribution. It consists of a server and client component
How to check for latest available version
# fetch http://update.freebsd.org/12.0-RELEASE/amd64/pub.ssl # Get public key. Verify the signature yourself # fetch http://update.freebsd.org/12.0-RELEASE/amd64/latest.ssl # Get metadata # openssl rsautl -pubin -inkey pub.ssl -verify <latest.ssl output looks like: freebsd-update|amd64|12.0-RELEASE|10|cae42a89f90be555b530a759cd400925bce03ed73ee78e665bef3fe5293e872f|1576022400