airport-linkmon(1) on Linux
The text 87ea3466bcf0, as Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it. The page shows this text now.
Wireless link quality monitor for the original Apple AirPort Base Station ("Graphite") and the Lucent RG-1000 base station