easy_install pip on Arduino Yun fails
Found this Arduino Forum Thread helpful.

# wget \
https://pypi.python.org/packages/source/p/pip/pip-6.0.8.tar.gz#md5=2332e6f97e75ded3bddde0ced01dbda3\
  --no-check-certificate
# easy_install pip-6.0.8.tar.gz


Apparently the PyPi Package Site is now HTTPS and hence --no-check-certificate option should be used. Also MD5 Checksum of the package needs to attached in the link in order to avoid a HTTP 404 Error