mkfontscale(1) on Linux
The text e44647a03507, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it.
create an index of scalable font files for X
Flags it lists
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-- -
-U -
-b -
-e -
-l -
-n -
-p -
-r -
-s -
-u -
-v