NAME

       g_options - Utility program for generating GROMACS documentation VERSION 4.5.4

SYNOPSIS

       g_options -[no]h -[no]version -nice int

DESCRIPTION

       GROMACS programs have some standard options, of which some are hidden by default:

OTHER OPTIONS

       -[no]hno
        Print help info and quit

       -[no]versionno
        Print version info and quit

       -nice int 0
        Set the nicelevel

KNOWN PROBLEMS

       -  If the configuration script found Motif or Lesstif on your system, you can use the graphical interface
       (if not, you will get an error):
        -X gmx_bool  no Use dialog box GUI to edit command line options

       - When compiled on an SGI-IRIX system, all GROMACS programs have an additional option:
        -npri int  0 Set non blocking priority (try 128)

       - Optional files are not used unless the option is set, in contrast  to  non-optional  files,  where  the
       default file name is used when the option is not set.

       -  All GROMACS programs will accept file options without a file extension or filename being specified. In
       such cases the default filenames will be used. With multiple input file types, such as generic  structure
       format,  the directory will be searched for files of each type with the supplied or default name. When no
       such file is found, or with output files the first file type will be used.

       - All GROMACS programs with the exception of  mdrun and  eneconv check if the command  line  options  are
       valid.  If this is not the case, the program will be halted.

       -  Enumerated  options  (enum) should be used with one of the arguments listed in the option description,
       the argument may be abbreviated. The first match to the shortest argument in the list will be selected.

       - Vector options can be used with 1 or 3 parameters. When only one parameter is supplied the  two  others
       are also set to this value.

       -  All  GROMACS  programs  can  read  compressed or g-zipped files. There might be a problem with reading
       compressed  .xtc,  .trr and  .trj files, but these will not compress very well anyway.

       - Most GROMACS programs can process a trajectory with fewer atoms than the run input or  structure  file,
       but only if the trajectory consists of the first n atoms of the run input or structure file.

       -  Many  GROMACS  programs will accept the  -tu option to set the time units to use in output files (e.g.
       for  xmgr graphs or  xpm matrices) and in all time options.

SEE ALSO

       gromacs(7)

       More information about GROMACS is available at <http://www.gromacs.org/>.

                                                 Mon 21 Mar 2011                                    g_options(1)