ngrok install

ngrok.bash

#!/bin/bash

pushd /tmp
    echo "Downloading ngrok..."
    rm -f /tmp/ngrok.zip
    curl --silent https://dl.ngrok.com/darwin_amd64/ngrok.zip -o /tmp/ngrok.zip
    echo "Done!"
    tar -xvf /tmp/ngrok.zip
    if echo "$PATH" | grep /usr/local/bin; then 
        echo -e "\n\nEnter your password at the prompt (it won't show up on the screen, but it's typing)"
        sudo mv ngrok /usr/local/bin
        echo 'Done!'
    else
        echo "Enter your password at the prompt (it won't show up on the screen, but it's typing)"
        sudo mv ngrok /usr/bin
        echo 'Done!'
    fi
popd