install node_exporter on ubuntu as a systemd service

install_node_exporter.sh

export VER=1.9.1
useradd -M -r -s /bin/false node_exporter && \
wget https://github.com/prometheus/node_exporter/releases/download/v$VER/node_exporter-$VER.linux-amd64.tar.gz && \
tar xvfz node_exporter-*.*-amd64.tar.gz && \
chmod +x node_exporter-$VER.linux-amd64/node_exporter && \
cp node_exporter-$VER.linux-amd64/node_exporter /usr/local/bin/ && \
touch /etc/systemd/system/node_exporter.service && \

cat> /etc/systemd/system/node_exporter.service <<EOF
[Unit]
Description=Prometheus Node Exporter
Wants=network-online.target
After=network-online.target

[Service]
User=node_exporter
Group=node_exporter
Type=simple
ExecStart=/usr/local/bin/node_exporter --collector.cpu --collector.meminfo --collector.loadavg --collector.filesystem --collector.hwmon --collector.infiniband --collector.netdev --collector.stat --collector.diskstats --collector.bonding

[Install]
WantedBy=multi-user.target
EOF

systemctl enable node_exporter.service && \
systemctl restart node_exporter.service && \
systemctl status node_exporter.service && \
netstat -tulpn | grep 9100