INSTALLATION:

Go to /etc/apt/sources.list, for example:

$ sudo emacs -nw /etc/apt/sources.list

and add this at the bottom:

## added for Scrapy ##

deb http://archive.scrapy.org/ubuntu natty main

where you substitute natty with whatever your release is, and therefore with whatever the output of:

$ lsb_release -cs

Update and install,

$ sudo apt-get update

$ sudo apt-get install scrapy-0.15

and off you go!