shtool-subst(1) on Linux
The text cc3eb84ceb40, as Debian 5.0 (Lenny) shipped it.
GNU shtool sed(1) substitution operations
Flags it lists
-
--backup -
--exec -
--file -
--interactive -
--nop -
--quiet -
--stealth -
--trace -
--verbose -
--warning -
-b -
-e -
-f -
-i -
-n -
-q -
-s -
-t -
-v -
-w