.NET Core 1.1.7 SDK Install and Ubuntu 18.04 Issues

I have downloaded the dotnet core v1.1.7 SDK from https://dotnet.microsoft.com/download/dotnet/1.1 for Ubuntu.

I have followed the steps listed in (https://docs.microsoft.com/en-us/dotnet/core/install/linux-scripted-manual) here, including verifying all dependencies are installed which they are shown to have be installed

DOTNET_FILE=<your archive >
export DOTNET_ROOT=$HOME/dotnet

mkdir -p "$DOTNET_ROOT" && tar zxf "$DOTNET_FILE" -C "$DOTNET_ROOT"

export PATH=$PATH:$DOTNET_ROOT

When I attempt use the sdk to do anything including version checking I receive the following:

dotnet --version
Failed to initialize CoreCLR, HRESULT: 0x80131500