nraynaud@cruiser:~$ gs --help
AFPL Ghostscript 7.04 (2002-01-31)
Copyright (C) 2001 artofcode LLC, Benicia, CA.  All rights reserved.
Usage: gs [switches] [file1.ps file2.ps ...]
Most frequently used switches: (you can use # in place of =)
 -dNOPAUSE           no pause after page   | -q       `quiet', fewer messages
 -g<width>x<height>  page size in pixels   | -r<res>  pixels/inch resolution
 -sDEVICE=<devname>  select device         | -dBATCH  exit after last file
 -sOutputFile=<file> select output file: - for stdout, |command for pipe,
                                         embed %d or %ld for page #
Input formats: PostScript PostScriptLevel1 PostScriptLevel2 PDF
Available devices:
   x11 bbox ap3250 appledmp bit bitcmyk bitrgb bj10e bj200 bjc600 bjc800
   bmp16 bmp16m bmp256 bmpamono bmpmono ccr cdeskjet cdj500 cdj550 cdjcolor
   cdjmono cgm24 cgm8 cgmmono cif cljet5 cp50 declj250 deskjet dfaxhigh
   dfaxlow djet500 djet500c dnj650c eps9high eps9mid epson epsonc epswrite
   faxg3 faxg32d faxg4 hl7x0 ibmpro imagen inferno iwhi iwlo iwlq jetp3852
   jpeg jpeggray laserjet lbp8 lips3 lj250 lj4dith lj5gray lj5mono ljet2p
   ljet3 ljet3d ljet4 ljet4d ljetplus lp2563 lp8000 lq850 m8510 mgr4 mgr8
   mgrgray2 mgrgray4 mgrgray8 mgrmono miff24 necp6 oce9050 oki182 okiibm
   paintjet pbm pbmraw pcx16 pcx24b pcx256 pcxcmyk pcxgray pcxmono pdfwrite
   pgm pgmraw pgnm pgnmraw pj pjetxl pjxl pjxl300 pkm pkmraw plan9bm png16
   png16m png256 pnggray pngmono pnm pnmraw ppm ppmraw psgray psmono psrgb
   pswrite pxlcolor pxlmono r4081 sgirgb sj48 st800 stcolor t4693d2 t4693d4
   t4693d8 tek4696 tiff12nc tiff24nc tiffcrle tiffg3 tiffg32d tiffg4 tifflzw
   tiffpack uniprint x11alpha x11cmyk x11cmyk2 x11cmyk4 x11cmyk8 x11gray2
   x11gray4 x11mono display ijs pcl3 nullpage
Search path:
   . : /usr/local/lib/ghostscript/common : /usr/local/lib/ghostscript/7.04 :
   /usr/local/lib/ghostscript/fonts : /usr/local/share/ghostscript/common :
   /usr/local/share/ghostscript/7.04 : /usr/local/share/ghostscript/fonts :
   /var/lib/defoma/gs.d/dirs/fonts : /usr/share/ghostscript/common :
   /usr/share/gs-aladdin/7.04
For more information, see /usr/share/doc/gs-aladdin/Use.htm.
Report bugs to bug-gs@ghostscript.com, using the form in Bug-form.htm.