TensorFlow作为谷歌第二代机器学习系统，现以Apache 2.0的开源协议开放。以下安装命令在Ubuntu 15.04上亲测安装成功。
# For CPU-only version
$ pip install https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.5.0-cp27-none-linux_x86_64.whl
# For GPU-enabled version (only install this version if you have the CUDA sdk installed)
$ pip install https://storage.googleapis.com/tensorflow/linux/gpu/tensorflow-0.5.0-cp27-none-linux_x86_64.whl参考网站：
[1] TensorFlow官网：http://tensorflow.org/
[2] Apache 2.0开源协议：http://www.apache.org/licenses/LICENSE-2.0