astatham/one liner to split a multifasta into separate single fasta

## one liner to split a multifasta into separate single fasta
cat hg18.fa | awk '{
        if (substr($0, 1, 1)==">") {filename=(substr($0,2) ".fa")}
        print $0 > filename
}'
	cat hg18.fa \| awk '{
	if (substr($0, 1, 1)==">") {filename=(substr($0,2) ".fa")}
	print $0 > filename
	}'