This example shows the minimum commands you need to get from fixed-length unpaired reads to OTU sequences. In practice, you'll probably need to do more read preparation. The data has 4,259 reads of a mock community which generate ~21 OTUs. You need to set the environment variable $usearch to a valid command name for usearch, e.g. the full path name of the binary file.
Download commands and data
Reads: right-click on ex_min_reads.fq and click Save As.
Bash script: select all text below (ctrl+A) and copy/paste into a text editor, or right-click on ex_min.bash and click Save As.