在安装pip的过程中，从https://pypi.python.org/pypi/pip下载pip-7.1.2.tar.gz，解压后python setup.py install进行安装，出现报错信息：

/usr/local/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'entry_points'

 warnings.warn(msg)

/usr/local/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'extras_require'

 warnings.warn(msg)

/usr/local/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'zip_safe'

 warnings.warn(msg)

/usr/local/lib/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: 'tests_require'

 warnings.warn(msg)

   google发现http://stackoverflow.com/questions/11425106/python-pip-install-fails-invalid-command-egg-info提示setuptools缺乏，于是从https://pypi.python.org/pypi/setuptools下载setuptools，解压好python setup.py install安装，成功后再安装pip，提示成功后运行pip，得到如下信息