#!/bin/bash set -e fnm install v6.10.0 fnm install v8.10.0 fnm install v10.10.0 fnm use v8.10.0 fnm exec -- node -v | grep "v8.10.0" fnm exec --using 6 -- node -v | grep "v6.10.0" fnm exec --using 10 -- node -v | grep "v10.10.0"