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sed or awk to replace a value in a certain line containing a string

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# 8  
Old 03-29-2012
The problem is now that it replace all the instance with meu. I just want to replace it only one time, at the beginning.
# 9  
Old 03-29-2012
So you're going to change the input as well as fric.txt on each and every run? Otherwise I don't really understand what you're trying to do.
# 10  
Old 03-29-2012
I put the number in front of mue from the fric.txt . Then I delete the top line so that he lower line bubbles up to the top ready to be taken in the next step and so on.
yes the fric.txt change each time. giving the number for input file.
# 11  
Old 03-29-2012
Frankly I still don't understand exactly what you're trying to do, but if you only want to do the substitution once you could have:

Code:
awk 'BEGIN{getline line <"fric.txt"} /mue/{if (done_already) {print} else {printf ("%s %-8s %s\n", $1, $2, line);done_already=1}} $0 !~ /mue/ {print}' file

This User Gave Thanks to CarloM For This Post:
hamnsan
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