fbsetbg(1) on Linux
The text 1383a6923b8d, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Set a background wallpaper or pattern
Flags it lists
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-A -
-B -
-C -
-F -
-R -
-T -
-U -
-a -
-b -
-c -
-f -
-h -
-i -
-l -
-p -
-r -
-t -
-u