How to find cuda version in ubuntu?

Question

I installed cuda 8.0 in my ubuntu 16.04 machine and checked the cuda version using the command "nvcc --version". it shows version as 7.5!!!.How Can I be sure that it is accurate? Are there other commands that I can also use to verify my result?

I have GTX970 GPU. No I didn't installed cuda previously in my system. — Sowmya Dhanapal
– Sowmya Dhanapal, Commented Jan 18, 2017 at 8:54
I downloaded the package from "developer.nvidia.com/compute/cuda/8.0/prod/local_installers/…" and I followed the installation instructions. — Sowmya Dhanapal
– Sowmya Dhanapal, Commented Jan 18, 2017 at 9:53
What path did you install CUDA 8.0 to? What is the output of which nvcc? — tera
– tera, Commented Jan 18, 2017 at 11:35

user3076252 · Accepted Answer · 2022-11-29 00:01:44Z

49

[edited 2022]

For CUDA 11:

$ cat /usr/local/cuda/version.json

For cuda-8.0 on Ubuntu16.04, you should be able to read

$ cat /usr/local/cuda/version.txt CUDA Version 8.0.44

I agree with Robert Crovella, you might need to check your PATH

edited Nov 29, 2022 at 0:01

answered Feb 8, 2017 at 20:27

user3076252

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2 Comments

Punnerud Over a year ago

/usr/local/cuda is a symlink to the version you have installed. You can install cuda without the symlink and then this will not work.

Alon Samuel Over a year ago

For me it was : cat /usr/local/cuda/version.json

Sanyam Mehra · Accepted Answer · 2018-11-08 03:19:54Z

Starting from CUDA 8.0, it's possible to have multiple CUDA versions installed. You can then activate different values for $PATH environment variable that will present you with different CUDA version.

Command to immediately obtain the CUDA version:

$ nvcc --version | grep "release" | awk '{print $6}' | cut -c2-

You can confirm the result by checking the install status of CUDA libraries:

$ dpkg -l | grep cuda

For installing multiple versions of CUDA, you can refer to this article.

Sowmya Dhanapal · Accepted Answer · 2017-01-19 05:59:12Z

Thank you all... Previously I tried to install cuda8.0 using run file from https://developer.nvidia.com/compute/cuda/8.0/prod/local_installers/cuda_8.0.44_linux-run. After that I tried to check "nvcc --version", but it shows the following error "The program 'nvcc' is currently not installed. You can install it by typing: sudo apt-get install nvidia-cuda-toolkit". So I tried the above command. It gave the cuda7.5 version.

Later I tried to install cuda using debian package which by default contained nvcc. Now I am getting correct version.

Follow the directions in the linux getting started guide. When you use a runfile installer, you must update your PATH environment variable. If you don't do that, you will get the message about nvcc not being installed.

Sagar Chand · Accepted Answer · 2017-10-06 03:55:31Z

It may be due to the fact that you have both v7.5 and v8.0 installed. So instead of changing path, try uninstalling v7.5 first

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