title: convert .csv to a .xlsx from CLI
body: <p>I found this for the opposite conversion <a href="https://stackoverflow.com/questions/15746295/convert-xlsx-to-text-csv-via-command-line-only-on-linux">Convert xlsx to text CSV via command line only on Linux</a>
  But I have absolutely no understanding of that line of code.  Can anyone tell me how to convert from a csv to a xlsx from the CLI?
  Thanks in advance for any help.</p>