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Full Discussion: To check the file and remove header before copying
Top Forums Shell Programming and Scripting To check the file and remove header before copying Post 302999221 by RudiC on Thursday 15th of June 2017 11:31:15 AM
Old 06-15-2017
Not sure I fully understand. You want to copy all files whose names contain a string from the property.txt file, and remove the header line(s) from those who end in _01.txt?

Your sample code is not of great help to deduct in detail what you're after. I'm afraid it won't copy anything as $file's doesn't seem to be predictable because a) $filepath is undefined and thus empty b) the ls result to be assigned to file is grepped for $file itself, mayhap shooting yourself in the foot. $i, the variable looping through property.txt, isn't used for copying, just for testing for a filename existence. And, no provision is made to handle _01.txt files differently.

How many lines are the headers to be suppressed?
 

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LEARN ABOUT ULTRIX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
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