arobb

# Machine with internet access
virtualenv -p $(which python2.7) venv
source venv/bin/activate
mkdir pip-sources
pip download --no-binary ./pip-sources <package1>
pip download --no-binary ./pip-sources <package2>
pip install --no-index --find-links=./pip-sources <package1> <package2>
pip freeze > pip_requirements.txt
tar czf required-packages.tar.gz pip_requirements.txt ./pip-sources

arobb

#
# Access ZFS array on Mac without Open ZFS on OS X (O3X)
#
# Origin: O3X crashing computer, and drive array could not be attached 
#   as a complete set (as a USB device) to a VM. Used only as recovery
#   mechanism to extract data from the ZFS array. ZFS is not fully
#   supported on Ubuntu 15 (should be baked into 16).
#
# Requires raw access to the disks: directly attach as USB device
#   or (as in this description) disks are accessed as raw devices

arobb

# From  
# https://sites.google.com/site/astudyofentropy/project-definition/raspberry-pi-internal-hardware-random-number-generator  
# http://scruss.com/blog/2013/06/07/well-that-was-unexpected-the-raspberry-pis-hardware-random-number-generator/  

# Install the kernel module for the hardware RNG  
# After this command, random data is available from /dev/hwrng  
sudo modprobe bcm2708-rng

# Make sure it's activated each boot  
# Add this to /etc/modules