Replacing specific characters using sed Post: 302750389

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Hi, I have a input of the form: ..., word1, word2, word3... I want out put of the form word1, word2, word3 I tried echo '..., word1, word2, word3...' | tr -d '...,' but that takes out the commas in the middle too so I get word1 word2 word3 but I want the commas in the middle. ...

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Hi guys, I'm new to bash programming, so please pardon me. I'm trying to replace an entry's text in Books.txt This code works perfectly: sed -i "s/$BookTitle/$NewBookTitle/g" Books.txt But problem is, if there are double entries, it will also replace that entry. For example: ...

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LEARN ABOUT OSX

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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replacing specific characters in a string

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help on sed replacing special characters

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Sed - merge lines bw 2 specific characters

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