wc\\

wc some_file\\
 wc tursiops.fa\\ 
 	gives 183354   249746 11950358 tursiops.fa\\
 		lines = 183354\\
 		words = 249746\\
 		bytes = 11950358\\
 	
 wc tursiops.fa -l\\
 	gives 183354
 	
 grep ">" tursiops.fa |wc -l\\
 	-output from one command can be feed into another command