zerk(1) on Linux
The text 0dedcc7a5c18, as Debian 13 (Trixie) shipped it.
All purpose GREIS fitting
Flags it lists
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-? -
-O -
-R -
-S -
-V -
-W -
-c -
-d -
-e -
-f -
-h -
-p -
-r -
-s -
-v -
-w