Awk is widely used these days for extraction and manipulation of large scale biological data in Unix...single liner.
Useful Weblinks:
http://www.grymoire.com/Unix/Awk.html
http://www.hcs.harvard.edu/~dholland/computers/awk.html...
...crobes from these samples.
Example: Gut microbiome, soil sample, water, etc.
More information:
http://www.nature.com/nrmicro/focus/metagenomics/index.html
http://www.ploscompbiol.org/...