dumb xargs demo

README

I've had a rough understanding of xargs for some time (allows you to do 
_something_ with the output of a previous command), but never understood it 
well enough to instinctively reach for it while working on the command line. 
So, I decided I'd put a little demo together in order to learn more about it. 
The demo is, admittedly, very basic but it was enough to help me get a better 
understanding of what xargs can do and when you might want to use it.

Roughly, the demo does the following:

1.) pipe a list of images to xargs
2.) construct a URL for each image
3.) download files using newly constructed URLs - in parallel 

images.txt

1.jpg
2.jpg
3.jpg
4.jpg
5.jpg
6.jpg
7.jpg
8.jpg
9.jpg
10.jpg

xargs_demo.sh

#! /bin/bash

# 1.) pipe list of images to xargs
# 2.) construct URL for each image
# 3.) download files in parallel 
cat images.txt | xargs -I img -P 0 wget -O img "http://fillmurray.com/222/"img