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Append something on filename. find -name "*H_*.scf" -exec rename 's/H_//' {} ";" #Append #Filename #find

Append to the file name. $ for filename in *.scf; do mv "$filename" "H_$filename"; done; #append #mv #rename

Append the string to fasta header. $ sed 's/>.*/&_Bacteria/' foo.in > out.fasta #Sed #Fasta #String #Append