otfmerge(1) on Linux
The text 4647acce82f7, as Debian 10 (Buster) shipped it.
otfmerge
Flags it lists
-
--help -
--long -
--snaps -
--stats -
-V -
-f -
-h -
-n -
-o -
-p -
-rb -
-wb -
-z