cat question Post: 302596329

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strange cat question.

Does anyone know what the microprograms behind cat (and other commands) are like? In what language are those programs designed? Is their source available somewhere? No particular reason, just wondering. I know it's a bit strange...

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Difference between cat , cat > , cat >> and touch !!!

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hi all i have some script echo $$ > process-id d='cat process-id' if test-s "TMP"$d then echo "serv1" else echo "serv2" fi the variable d should contain the number of the process, instead of that it contains 'cat process-id' how shall i do that the d will contain only the number?...

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Hello Friends, I have a question, i am trying to write a shell script in the bash shell. #!/bin/sh NAWK=/bin/nawk AWK=/bin/awk FIX_XML_PATH=/home/administrator/testfix/fix/ Y=`ls $FIX_XML_PATH | grep xml` echo $Y cat $Y in this case when i do the echo $Y command it gives me the...

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Hello, I am trying to send text to a USB to serial adaptor and then to an external speech synthesizer. I tried using the cat and echo commands with no luck. I have gotten some audio output from my synthesizer using Kermit a terminal emulator, so I am pretty sure my synthesizer and my USB to serial...

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I am having problems getting a list of filenames that I want from a directory. example: I have 3 files - filename.xxx.20110505.123030 filename.yyy.20110505.123030 filename.zzz.20110505.123030 There may be multiple xxx,...

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Can any one guide me how can i accomplish this by script i continuously receive files via our ftp server into a certain folder is there a way i can take those files cat it to a new file by hour and create a new file when new hour starts?

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Can we concatenate say, I have a few files prefixing with 2009... So now i want all the 2009 files into one single file.. Can this be achieved????

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Apologies, probably a really simple problem: I've got a text file (nh.txt) with this in it: user1 email1 email2 user2 email1 email2 etc With the following basic script: for tline in $(cat nh.txt) do echo "**********" echo $tline done ...

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Cat/File Descriptor Question

For the command below, I need to understand what exactly the command does and provide an examples for which the output will be saved to file save2... From my understanding, if the file provides an error in the first half of the pipe, it'll save to save1 and will never give an error to save to...

LEARN ABOUT OSF1

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

strange cat question.

Discussion started by: sanchopansa

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Difference between cat , cat > , cat >> and touch !!!

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question about cat in script

Discussion started by: naamas03

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Question regarding cat command

Discussion started by: asirohi