> grib_keys -L \n GRIB1 GRIB2 reduced_gg_ml_grib2 reduced_gg_pl_grib1 reduced_gg_sfc_grib1 reduced_gg_ml_grib1 reduced_gg_pl_grib2 reduced_gg_sfc_grib2 reduced_gg_sfc_jpeg_grib2 reduced_ll_sfc_grib1 reduced_ll_sfc_grib2 regular_gg_ml_grib1 regular_gg_ml_grib2 regular_gg_pl_grib1 regular_gg_pl_grib2 regular_ll_sfc_grib1 regular_ll_sfc_grib2 regular_ll_pl_grib1 regular_ll_pl_grib2 sh_ml_grib1 sh_ml_grib2 sh_pl_grib1 sh_pl_grib2
> grib_keys -T regular_ll_sfc_grib1