To get the stock quotes for NYSE listings create some file named stockval and add it to your PATH.
Then gedit the file with the text:
#!/bin/bash p=`printf "curl -s 'http://download.finance.yahoo.com/d/quotes.csv?s=$1&f=l1'"` price=`eval $p`; echo $price
Make that file executable
chmod +x stockval
Close out, and open a terminal. If you have the path correctly configured, execute the stockval command using the company symbol as an argument and it returns the stock price on the line below.
stockval goog 732.15 << output