pbmtolj --version (return code: 0)
pbmtolj: Using libpbm from Netpbm Version: Netpbm 10.0
pbmtolj: BSD defined
pbmtolj: RGB_ENV='RGBDEF'
pbmtolj: RGBENV= 'RGBDEF' (env vbl is unset)
pbmtolj -h (return code: 1)
usage: pbmtolj [-noreset|-float|-packbits|-delta|-compress|-resolution N|-copies N] [pbmfile]
resolution = [75|100|150|300|600] (dpi)