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The default behaviour for grib_compare without any option is to perform a bit by bit comparison of the two messages. If the messages are found to be bitwise different then grib_compare switches to a "key based" mode to find out which coded keys are different. To see how grib_compare works we first set the shortName=2d (2 metre dew point temperature) in the file regular_latlon_surface.grib1
Code Block > grib_set -s shortName=2d regular_latlon_surface.grib1 2d.grib1
grib_copy examples
To copy only the pressure levels from a file
Code Block > grib_copy -w levtype=pl ../data/tigge_pf_ecmwf.grib2 out.grib
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