CDO

It may seem a trivia question but i am trying to convert a grib2 file to an nc file and then trim the down to a selected location

The original grib2 file is a Gaussian grid
cdo griddes test.grb2 #

1. gridID 2 #
   gridtype = gaussian
   gridsize = 663552
   xname = lon
   xlongname = longitude
   xunits = degrees_east
   yname = lat
   ylongname = latitude
   yunits = degrees_north
   np = 288
   xsize = 1152
   ysize = 576
   xfirst = 0
   xinc = 0.313

After I convert the grib2 to netCDF files, I run want to run the remapbil command so as to obtain a Regular grid with resolution of 0.125 or finer
what is the option that has to be after the operator or remapbil so as to obtain the Regular fine resolution grid.

e.g cdo remapbil,option ifile ofile

thank you