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Full Discussion: Extract the lines from input file
Top Forums Shell Programming and Scripting Extract the lines from input file Post 302435754 by sandy1028 on Thursday 8th of July 2010 07:13:39 AM
Old 07-08-2010
Can you please explain me how it works.

I want delete all the lines, in which timestamp doesn't falls in between 05/Jul/2010:07 to 06/Jul/2010:08.

---------- Post updated at 06:13 AM ---------- Previous update was at 06:00 AM ----------

File contains 19739530 lines. Is sorting expensive. Is there any other way?
 

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LEARN ABOUT MINIX

sgitopnm

sgitopnm(1)                                                   General Commands Manual                                                  sgitopnm(1)

NAME

       sgitopnm - convert a SGI image file to a portable anymap

SYNOPSIS

       sgitopnm [-verbose] [-channel c] [SGIfile]

DESCRIPTION

       Reads  an SGI image file as input.  Produces a PGM image for a 2-dimensional (1 channel) input file, and a PPM image for a 3-dimensional (3
       or more channels) input file.

       Alternatively, produces a PGM image of any one of the channels in the input file.

OPTIONS

       -verbose
              Give some information about the SGI image file.

       -channel c
              Extract channel c of the image as a PGM image.  Without this option, sgitopnm extracts the first 3 channels as a PPM  image  or,  if
              the input has only 1 channel, extracts that as a PGM image, and if the input has 2 channels, fails.

REFERENCES

       SGI Image File Format documentation (draft v0.95) by Paul Haeberli (paul@sgi.com).  Available via ftp at sgi.com:graphics/SGIIMAGESPEC.

SEE ALSO

       pnm(5), pnmtosgi(1)

AUTHOR

       Copyright (C) 1994 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)

                                                                    29 Jul 2000                                                        sgitopnm(1)
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