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Top Forums Shell Programming and Scripting Problem with sed (search/replace) Post 302229282 by aigles on Tuesday 26th of August 2008 04:31:10 PM
Old 08-26-2008
Replace single quotes by double quotes in your sed command (variables will be expanded) and use (( )) for calculations
Code:
max=12
increment=2
before=10
while [ $before -le $max ]
do
   sed -i_temp "/WORD/s/$before/$((before + increment))/g"  FILE
   (( before = $before + $increment ))
done

Jean-Pierre.

Last edited by aigles; 08-26-2008 at 05:49 PM.. Reason: Quoting corrections
 

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GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
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