/usr/share/doc/grads/examples/wrfgrid.ctl is in grads 2.0.a9-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | dset ^wrf_sample.nc
dtype netcdf
undef -888
TITLE WRF Output Grid Coordinates: south_north, west_east
xdef 249 linear 1 1
ydef 249 linear 1 1
zdef 1 linear 1 1
tdef 2 linear 11jun2002 3hr
vars 2
XLONG=>glon 0 t,y,x grid longitude
XLAT=>glat 0 t,y,x grid latitude
endvars
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