CUDA 7.0 patch error opening


Problem opening:

$ sudo tar zxvf ~/cufft_patch_mac.tar.gz ; exit;
tar: Error opening archive: Failed to open ‘/cufft_patch_mac.tar.gz’

Other commands OK:

Assuming your CUDA 7.0 top-level installation exists at /Developer/NVIDIA/CUDA-7.0,
the following commands inside an xterm window should work:

cp cufft_patch_mac.tar.gz ~ cd /Developer/NVIDIA/CUDA-7.0
$ sudo tar zxvf ~/cufft_patch_mac.tar.gz

This will update the cufft libraries inside /Developer/NVIDIA/CUDA-7.0/lib

Downloaded patch several times but same error each time.