dpipe(1) on Linux
The text b433c69649a7, as Arch Linux 2026-11-01, Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny) shipped it. The page shows this text now.
bi-directional pipe command