wait-for-it(8) on Linux
The text 49b81653aa44, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it. The page shows this text now.
script to test and wait on the availability of a TCP host and port
Flags it lists
-
--port -
--quiet -
--strict -
--timeout -
-p -
-q -
-s -
-t