pscontour(1gmt) on Linux
The text 4a6fa3593446, as Debian 7 (Wheezy) shipped it.
Contour xyz-data by direct triangulation [method]
Flags it lists
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-: -
-A -
-B -
-C -
-D -
-E -
-G -
-GD -
-Gd -
-Gf -
-Gn -
-H -
-I -
-J -
-Jz -
-K -
-L -
-N -
-O -
-P -
-R -
-S -
-T -
-U -
-V -
-W -
-bi -
-bo -
-c -
-m