I'm having trouble getting the linux support branch working.

I followed all the directions found here: https://code.google.com/p/volatility/wiki/LinuxMemoryForensics

I just can't seem to get it to work.  Here's what I'm getting:

joe@zuul:~/volatility/lin64-support$ python vol.py 
Welcome to volshell! 
To get help, type 'help()'
>>> session.filename = "/home/joe/dump"
Traceback (most recent call last):
  File "<console>", line 1, in <module>
NameError: name 'session' is not defined

Can anyone help me with this, or point me to a download for the older linux branch, which was previously working for me?  Thank you very much.


--
Joe Sylve, M.S.
Senior Security Researcher
GIAC Certified Forensics Analyst (GCFA)
Digital Forensics Solutions, LLC
http://www.digitalforensicssolutions.com/