On further reading, it appears Calibre did not support the Nook 2nd edition until version 0.8.something. I uninstalled my 0.7.44 and attempted to follow these instructions:
My system has python 2.7.1 installed.
wget -O-
http://status.calibre-ebook.com/dist/src | tar xvz
cd calibre*
sudo python setup.py install
It downloaded ok, but on starting the install, it finished with an error message and Calibre is not recognized by the system and will not run. Here is the output of the attempted install:
marty@tux:~$ cd calibre*
marty@tux:~/calibre$ sudo python setup.py install
[sudo] password for marty:
Traceback (most recent call last):
File "setup.py", line 13, in <module>
import setup.commands as commands
File "/home/marty/calibre/setup/commands.py", line 28, in <module>
from setup.translations import POT, GetTranslations, Translations, ISO639
File "/home/marty/calibre/setup/translations.py", line 14, in <module>
from setup.build_environment import pyqt
File "/home/marty/calibre/setup/build_environment.py", line 12, in <module>
from PyQt4 import pyqtconfig
ImportError: No module named PyQt4
marty@tux:~/calibre$