That particular file is a little shielded and I suspect that you have downloaded only a 302 error page. However the following one liner works well enough on my system:
wget --referer http://support.amd.com \
https://www2.ati.com/drivers/linux/ubuntu/amdgpu-pro-17.40-492261.tar.xz
Note the use of the --referer
option. Looks like some effort has been made to prevent people using linking from outside the AMD site. This is easy enough, and quite reasonable I believe, to circumvent in this manner.
From the wget man pages:
--referer=url
Include `Referer: url' header in HTTP request. Useful for retrieving
documents with server-side processing that assume they are always being
retrieved by interactive web browsers and only come out properly when
Referer is set to one of the pages that point to them.
The full process on my own system worked as follows:
1. Initial download:
andrew@illium~$ wget --referer http://support.amd.com \
> https://www2.ati.com/drivers/linux/ubuntu/amdgpu-pro-17.40-492261.tar.xz
--2017-11-11 16:09:04-- https://www2.ati.com/drivers/linux/ubuntu/amdgpu-pro-17.40-492261.tar.xz
Resolving www2.ati.com (www2.ati.com)... 23.7.24.254
Connecting to www2.ati.com (www2.ati.com)|23.7.24.254|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 361491288 (345M) [application/x-tar]
Saving to: ‘amdgpu-pro-17.40-492261.tar.xz’
amdgpu-pro-17.40-492261 100%[=============================>] 344.74M 794KB/s in 7m 27s
2017-11-11 16:16:32 (789 KB/s) - ‘amdgpu-pro-17.40-492261.tar.xz’ saved [361491288/361491288]
2. Subsequent extraction:
andrew@illium~$ tar xvf amdgpu-pro-17.40-492261.tar.xz
amdgpu-pro-17.40-492261/
amdgpu-pro-17.40-492261/Packages
amdgpu-pro-17.40-492261/xserver-xorg-video-modesetting-amdgpu-pro_1.19.0-492261_amd64.deb
amdgpu-pro-17.40-492261/opencl-amdgpu-pro-icd_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/amdgpu-pro-lib32_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libgbm1-amdgpu-pro-base_17.40-492261_all.deb
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-ext_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libgles2-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-ext_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/gst-omx-amdgpu-pro_1.0.0.1-492261_amd64.deb
amdgpu-pro-17.40-492261/hsa-ext-amdgpu-pro-finalize_1.1.6-492261_amd64.deb
amdgpu-pro-17.40-492261/xserver-xorg-video-glamoregl-amdgpu-pro_1.19.0-492261_i386.deb
amdgpu-pro-17.40-492261/libllvm5.0-amdgpu-pro_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-glx_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/hsa-ext-amdgpu-pro-image_1.1.6-492261_amd64.deb
amdgpu-pro-17.40-492261/amdgpu-pro-install
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-appprofiles_17.40-492261_all.deb
amdgpu-pro-17.40-492261/amdgpu-pro-core_17.40-492261_all.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-dev_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/libvdpau-amdgpu-pro_17.0.1-492261_i386.deb
amdgpu-pro-17.40-492261/clinfo-amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0-dev_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/libgbm1-amdgpu-pro-dev_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/vulkan-amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/libegl1-amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/libopencl1-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-amdgpu1_2.4.82-492261_i386.deb
amdgpu-pro-17.40-492261/libgbm1-amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/rocm-amdgpu-pro-opencl-dev_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/rocm-amdgpu-pro-opencl_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libgbm1-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/rocr-amdgpu-pro-dev_1.1.6-492261_amd64.deb
amdgpu-pro-17.40-492261/xserver-xorg-video-amdgpu-pro_1.3.99-492261_amd64.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-radeon1_2.4.82-492261_amd64.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/hsa-runtime-tools-amdgpu-pro_1.1.6-492261_amd64.deb
amdgpu-pro-17.40-492261/libegl1-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0-runtime_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/hsa-runtime-tools-amdgpu-pro-dev_1.1.6-492261_amd64.deb
amdgpu-pro-17.40-492261/vulkan-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0-doc_5.0-492261_all.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-utils_2.4.82-492261_amd64.deb
amdgpu-pro-17.40-492261/rocm-amdgpu-pro-icd_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/opencl-amdgpu-pro-icd_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-glx_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/libllvm5.0-amdgpu-pro_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/rocm-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/clinfo-amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libvdpau-amdgpu-pro_17.0.1-492261_amd64.deb
amdgpu-pro-17.40-492261/roct-amdgpu-pro-dev_1.0.6-492261_amd64.deb
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-dri_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/amdgpu-pro-dkms_17.40-492261_all.deb
amdgpu-pro-17.40-492261/libgl1-amdgpu-pro-dri_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/gst-omx-amdgpu-pro_1.0.0.1-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-runtime_5.0-492261_amd64.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-dev_2.4.82-492261_amd64.deb
amdgpu-pro-17.40-492261/ids-amdgpu-pro_1.0.0-492261_all.deb
amdgpu-pro-17.40-492261/xserver-xorg-video-modesetting-amdgpu-pro_1.19.0-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0-runtime_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/libopencl1-amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/rocr-amdgpu-pro_1.1.6-492261_amd64.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-utils_2.4.82-492261_i386.deb
amdgpu-pro-17.40-492261/libdrm2-amdgpu-pro_2.4.82-492261_i386.deb
amdgpu-pro-17.40-492261/mesa-amdgpu-pro-omx-drivers_17.0.1-492261_amd64.deb
amdgpu-pro-17.40-492261/libglamor-amdgpu-pro-dev_1.19.0-492261_i386.deb
amdgpu-pro-17.40-492261/amdgpu-pro_17.40-492261_amd64.deb
amdgpu-pro-17.40-492261/libgbm1-amdgpu-pro-dev_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-dev_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-5.0-dev_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/Release
amdgpu-pro-17.40-492261/xserver-xorg-video-glamoregl-amdgpu-pro_1.19.0-492261_amd64.deb
amdgpu-pro-17.40-492261/xserver-xorg-video-amdgpu-pro_1.3.99-492261_i386.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-radeon1_2.4.82-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro-runtime_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/mesa-amdgpu-pro-omx-drivers_17.0.1-492261_i386.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-amdgpu1_2.4.82-492261_amd64.deb
amdgpu-pro-17.40-492261/roct-amdgpu-pro_1.0.6-492261_amd64.deb
amdgpu-pro-17.40-492261/amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/libglamor-amdgpu-pro-dev_1.19.0-492261_amd64.deb
amdgpu-pro-17.40-492261/libgles2-amdgpu-pro_17.40-492261_i386.deb
amdgpu-pro-17.40-492261/llvm-amdgpu-pro_5.0-492261_i386.deb
amdgpu-pro-17.40-492261/libdrm-amdgpu-pro-dev_2.4.82-492261_i386.deb
amdgpu-pro-17.40-492261/libdrm2-amdgpu-pro_2.4.82-492261_amd64.deb
andrew@illium~$
So hopefully this small wget trick will help you out....
file amdgpu-pro-17.40-492261.tar.xz
?