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   grops    ( 1 )

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Окружение (Environment)

GROFF_FONT_PATH
              A list of directories in which to seek the selected output
              device's directory of device and font description files.
              See troff(1) and groff_font(5).

       GROPS_PROLOGUE
              If this is set to foo, then grops uses the file foo (in
              the font path) instead of the default prologue file
              prologue.  The option -P overrides this environment
              variable.

       SOURCE_DATE_EPOCH
              A timestamp (expressed as seconds since the Unix epoch) to
              use as the creation timestamp in place of the current
              time.  The time is converted to human-readable form using
              ctime(3) and recorded in a PostScript comment.

       TZ     The time zone to use when converting the current time (or
              value of SOURCE_DATE_EPOCH) to human-readable form; see
              tzset(3).