Name
       dfits - display FITS file header information

Synopsis
       dfits [-x xtnum] <list>
       dfits [-x xtnum] -

Description
       dfits  displays FITS header informations on stdout. Header
       information  can  be  found  in  the  main   header   only
       (default),  in  extensions, or in both.  See the -x option
       below.  dfits accepts multi-file input.  `dfits -' expects
       single file data coming from stdin.

Options
       -x xtnum
              Specifies  the  extension  to print out. Extensions
              are numbered starting from 1. If this option is not
              specified,  only the main header is printed out. If
              this option specifies an extension  that  does  not
              exist, nothing is printed out.
              Specify 0 as extension number to get a print of the
              main header plus all extension headers.

       Examples :
       dfits *.fits
       dfits *.fits | grep NAXIS3
       gzip -d < star.fits.gz | dfits - | more
       dfits -x 0 *.fits
       dfits -x 3 *.fits

See Also
       fitsort can be combined with dfits output to sort out key-
       word values of a group of FITS files.

Files
       Files shall all comply with FITS format