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Shell Programming and Scripting
script - replace text in file
Post 94431 by frustrated1 on Saturday 31st of December 2005 06:54:56 AM
12-31-2005
ok - not quite what I am after
This is the result I get with your command based on the file I created test1
sed -e 's_^\(0232 \)red\( testing4\)$_\1blue\2\nInfo:Line changed_g' test1
0001 blue testing1
0002 blue testing2
0006 blue testing3
0232 blue testing4nInfo:Line changed
2143 blue testing5
3453 blue testing6
1st point - I will only know the number at the start of the line and the colour... I will not know what is contained on the rest of the line so I can use 'testing4' in my sed string
2nd point - this only returns the output to screen but the original file remains unchanged. I need to change the original file - bare in mind the original file could contain 300000 lines and I only want to change one..
Can you still help?
This is the result I get with your command based on the file I created test1
sed -e 's_^\(0232 \)red\( testing4\)$_\1blue\2\nInfo:Line changed_g' test1
0001 blue testing1
0002 blue testing2
0006 blue testing3
0232 blue testing4nInfo:Line changed
2143 blue testing5
3453 blue testing6
1st point - I will only know the number at the start of the line and the colour... I will not know what is contained on the rest of the line so I can use 'testing4' in my sed string
2nd point - this only returns the output to screen but the original file remains unchanged. I need to change the original file - bare in mind the original file could contain 300000 lines and I only want to change one..
Can you still help?
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LEARN ABOUT SUNOS
ppmdither
ppmdither(1) General Commands Manual ppmdither(1) NAME
ppmdither - ordered dither for color images SYNOPSIS
ppmdither [-dim power] [-red shades] [-green shades] [-blue shades] [ppmfile] DESCRIPTION
Reads a portable pixmap as input, and applies dithering to it to reduce the number of colors used down to the specified number of shades for each primary. The default number of shades is red=5, green=9, blue=5, for a total of 225 colors. To convert the image to a binary rgb format suitable for color printers, use -red 2 -green 2 -blue 2. OPTIONS
-dim power The size of the dithering matrix. The dithering matrix is a square whose dimension is a power of 2. power is that power of 2. The default is 4, for a 16 by 16 matrix. -red shades The number of red shades to be used, including black; minimum of 2. -green shades The number of green shades to be used, including black; minimum of 2. -blue shades The number of blue shades to be used, including black; minimum of 2. SEE ALSO
pnmdepth(1), ppmquant(1), ppm(5) AUTHOR
Copyright (C) 1991 by Christos Zoulas. 14 July 1991 ppmdither(1)