Android : NDK No such file or directory

I am trying to download the Android NDK and extract the android-ndk-r10c-linux-x86_64.bin package. The web site says to do the following:

1. chmod a+x android-ndk-r10c-darwin-x86_64.bin


2. ./android-ndk-r10c-darwin-x86_64.bin

Step 2 gives the following errors: No such file or directory

Any help? This should be easy.

I am running Ubuntu 14.04.1 LTS x86_64.