Reference

freebsd-cksum(1) on Linux

The text 5c1d01dc92d4, as Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.

display file checksums and block counts

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freebsd-cksum(1) on Linux now