substitute a string on a specific position for specific lines
I woud like to substitue a string on a specific position for specific lines
I've got a file and I would like to change a specific string from "TOCHANGE" to "ABCABCAB"
For every line (except 1,2, 3 and the last one) , I need to check between the 9th and the 16th digits.
For the 3rd line, I need to check between the 12th and the 19th digits.
No checks for line 1,3 and the last one.
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example 1:
Only the line 3 and 25 need to be amended
So I would like to get
-------------------------
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example 2:
Only the line 25 needs to be amended
So I would like to get
Do you have any idea about how I could do it?
I tried with the sed command but it works on the number of occurence.
I think it could be done via the awk command
Many thanks
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Last edited by Franklin52; 12-29-2010 at 09:19 AM..
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