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Full Discussion: grep + awk
Top Forums Shell Programming and Scripting grep + awk Post 302156028 by kamel.seg on Monday 7th of January 2008 04:41:09 AM
Old 01-07-2008
grep + awk

hi,

i want to replace $3 in file by $var i have used this line of command :

awk '!$3{$3=v}1' OFS="," FS="," v="$var" $file1> $file2

but i want just to replace it in specific line where when i found $string

i used this command :

grep $string $file1 | awk '!$3{$3=v}1' OFS="," FS="," v="$var" $file1> $file2


but i have the $3 changed in all the file1

any help please.

thanks
 

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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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