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Change Header of fastq files | awk one liner
Use the following awk for changing the header of the fastq files:

awk '{print (NR%4 == 1) ? "@1_" ++i : $0}' filename.fastq

Here the bold 1 can be changed to whatever string you wish to use.
Sunil Nagpal
MS(Research) Scholar, IIT Delhi (Alumnus)
Advisor for the Biotech Students portal (
Computational Researcher in BioSciences at a leading MNC

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