python - TensorFlow: libcudart.so.7.5: cannot open shared object file: No such file or directory

Question

I am running TensorFlow on Ubuntu 15.10. When I enter pip show tensorflow, I see that TF has been installed properly.

However, when I write import tensorflow as tf, I get the following error message:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/__init__.py", line 23, in <module>
    from tensorflow.python import *
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/python/__init__.py", line 49, in <module>
    from tensorflow import contrib
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/contrib/__init__.py", line 23, in <module>
    from tensorflow.contrib import layers
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/contrib/layers/__init__.py", line 68, in <module>
    from tensorflow.contrib.layers.python.layers import *
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/contrib/layers/python/layers/__init__.py", line 22, in <module>
    from tensorflow.contrib.layers.python.layers.initializers import *
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/contrib/layers/python/layers/initializers.py", line 24, in <module>
    from tensorflow.python.ops import random_ops
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/python/ops/random_ops.py", line 23, in <module>
    from tensorflow.python.framework import ops
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/python/framework/ops.py", line 39, in <module>
    from tensorflow.python.framework import versions
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/python/framework/versions.py", line 22, in <module>
    from tensorflow.python import pywrap_tensorflow
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 28, in <module>
    _pywrap_tensorflow = swig_import_helper()
  File "/home/me/anaconda2/lib/python2.7/site-packages/tensorflow/python/pywrap_tensorflow.py", line 24, in swig_import_helper
    _mod = imp.load_module('_pywrap_tensorflow', fp, pathname, description)
ImportError: libcudart.so.7.5: cannot open shared object file: No such file or directory

For what it's worth, I have followed the instructions here and set my LD_LIBRARY_PATH and CUDA_HOME environment variables.

Any advice?

EDIT:

I have installed CUDA 7.5 and added these to my .profile file:

export LD_LIBRARY_PATH="/usr/local/cuda-7.5/lib64"
export CUDA_HOME=/usr/local/cuda-7.5

However, I continue to see the same error message.

EDIT:

I see the following output when I run ldd /usr/local/cuda-7.5/lib64/libcudart.so.7.5:

linux-vdso.so.1 =>  (0x00007ffdac7ea000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fc27a281000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fc27a07d000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fc279e5e000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fc279c56000)
/lib64/ld-linux-x86-64.so.2 (0x00005604f5406000)

EDIT:

If it is relevant, I use GeForce GT640.

EDIT:

I followed @tommus' advice and called source ~/.profile before running TensorFlow, and now it works like a charm.

Thanks to everyone who tried to help me in the comments -- this is my first experience with any kind of Linux distribution, and I am really very appreciative of all the patient assistance I have received so far :-) You guys are absolutely awesome!

Answer 1

After editing .profile file you either need to log out and log back in or run the following command:

source ~/.profile

The solution is persistent so there is no need to perform it ever again.