axfr-get(8) on Linux
The text ed5a5bb6f965, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 5.0 (Lenny) shipped it. The page shows this text now.
a DNS zone-transfer client. It sends a zone-transfer request in DNS-over-TCP format to descriptor 7, reads the results from descriptor 6, and saves the results in a file.