sudo useradd --system --shell /bin/false node_exporter
curl -fsSL https://github.com/prometheus/node_exporter/releases/download/v1.3.1/node_exporter-1.3.1.linux-amd64.tar.gz \
| sudo tar -zxvf - -C /usr/local/bin --strip-components=1 node_exporter-1.3.1.linux-amd64/node_exporter \
&& sudo chown node_exporter:node_exporter /usr/local/bin/node_exporter