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1. To copy only the pressure levels from a file

   Code Block

   >>

   > grib_copy -w levtype=pl ../data/tigge_pf_ecmwf.grib2 out.grib




2. To copy only the fields that are not on pressure levels from a file

   Code Block

   >>

   > grib_copy -w levtype!=pl ../data/tigge_pf_ecmwf.grib2 out.grib




3. A grib_file with multi field messages can be converted in single field messageswith messages with a simple grib_copy.

   Code Block

   >>

   > grib_copy multi.grib simple.grib




4. Use the square brackets to insert the value of a keyin key in the name of the output file.

   Code Block

   >>

   > grib_copy in.grib out_[shortName].grib