I am aligning RNA-Seq data to human genome reference hg38. How can I build the index using hg38.fa

Thanks in advance
Bowtie
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<a href="http://bowtie-bio.sourceforge.net/tutorial.shtml#newi">Building a new index</a>


Bowtie2
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<a href="http://bowtie-bio.sourceforge.net/bowtie2/manual.shtml#the-bowtie2-build-indexer">The bowtie2-build indexer</a>
