ed(1) on Linux
The text 57a58cebed10, as Debian 12 (Bookworm) shipped it.
line-oriented text editor
Flags it lists
-
--extended-regexp -
--help -
--loose-exit-status -
--prompt -
--quiet -
--restricted -
--script -
--silent -
--strip-trailing-cr -
--traditional -
--verbose -
--version -
-E -
-G -
-V -
-h -
-l -
-p -
-q -
-r -
-s -
-v