ssh-import-id(1) on Linux
The text fcfb312374bf, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
retrieve one or more public keys from a public keyserver and append them to the current user's authorized_keys file (or some other specified file)