filter1d(1gmt) on Linux
The text 1f8ea77f1a18, as Debian 7 (Wheezy) shipped it.
Time domain filtering of 1-D time series
Flags it lists
-
-D -
-E -
-F -
-H -
-I -
-L -
-N -
-Q -
-S -
-T -
-V -
-bi -
-bo -
-f