What's the command to remove empty lines with sed? Post: 302450766

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I was just looking at this post: https://www.unix.com/shell-programming-scripting/22893-delete-multiple-empty-lines.html. and I am looking to achieve the same with sed. So the idea is to delete lines from a file where a certain field has no value. Inputfile: EMID MMDDYY HOURS JOB EMNAME 0241...

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Can somebody explain why my sed command is not working. I do the folloinwg: Generates a binary file to /tmp/x1.out /usr/lib/sa/sa2 -s 4:00 -e 8:00 -i 3600 -A -o /tmp/x1.out decodes the file (no problem so far) sar -f /tmp/x1.out When I do this it does not appear to delete the...

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Hi Everyone, # cat 1 a b b cc 1 2 3 3 3 4 55 5 a b

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Hello: I searched here for "vi -c" but found no hits. How can I use vi -c to remove ALL empty lines, regardless of how many? I tried <code> vi -c ":g/^$/d | wq" filename </code> but I have to run it several times. This is NOT homework. :) Thanks for your time.

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Hi, i need a single command to create multiple empty files(no trailing lines as well) and empty the files if already existing. please let me know or if this has been ansered, if some ocan share the link please, thanks > newfile.txt or :> newfile.txt do not work

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Need command to replace empty using sed/awk

Hi, In a file we have the following data like as below abcdef="cfg-1-15" bmmdda-g-45-2 yhdiao"rtg-1-df-34" I need a sed/awk command to replace the above string with empty. Thx,

LEARN ABOUT REDHAT

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)

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