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Top Forums Shell Programming and Scripting Using = with sed to increase sequence count Post 303024207 by Don Cragun on Wednesday 3rd of October 2018 04:30:46 AM
Old 10-03-2018
sed is a great tool; but, since you can't perform arithmetic calculations in sed , a 100% sed solution is not possible.

An awk solution for this is simple:
Code:
awk '/^>/{$0 = ">seq " ++seq}1' file

 

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