pstext(1gmt) on Linux
The text 01fa4057aff0, as Debian 6.0 (Squeeze) shipped it.
To plot text strings on maps
Flags it lists
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-: -
-B -
-C -
-D -
-E -
-G -
-H -
-J -
-Jz -
-K -
-L -
-N -
-O -
-P -
-R -
-S -
-U -
-V -
-W -
-Z -
-c -
-m