added scripts to start node exporter, and update cron jobs for node expoter

Author: DhruvSehgal

articles/sap/monitor/provider-linux.md

@@ -21,7 +21,7 @@ This content applies to both versions of the service, *Azure Monitor for SAP sol
 
 - An Azure subscription.
 - An existing Azure Monitor for SAP solutions resource. To create an Azure Monitor for SAP solutions resource, see the [quickstart for the Azure portal](quickstart-portal.md) or the [quickstart for PowerShell](quickstart-powershell.md).
-- Install the [node exporter version 1.3.0](https://prometheus.io/download/#node_exporter) in each SAP host that you want to monitor, either BareMetal or Azure virtual machine (Azure VM). For more information, see [the node exporter GitHub repository](https://github.com/prometheus/node_exporter).
+- Install the [node exporter latest version](https://prometheus.io/download/#node_exporter) in each SAP host that you want to monitor, either BareMetal or Azure virtual machine (Azure VM). For more information, see [the node exporter GitHub repository](https://github.com/prometheus/node_exporter).
 
 To install the node exporter on Linux:
 
@@ -35,6 +35,26 @@ To install the node exporter on Linux:
 
 1. The node exporter now starts collecting data. You can export the data at `http://IP:9100/metrics`.
 
+## Script to setup Node Exporter
+
+```shell
+# To get the latest node exporter version from: https://prometheus.io/download/#node_exporter
+wget https://github.com/prometheus/node_exporter/releases/download/v*/node_exporter-*.*-amd64.tar.gz
+tar xvfz node_exporter-*.*-amd64.tar.gz
+if [[ "$(grep '^ID=' /etc/*-release)" == *"rhel"* ]]; then
+    echo "Open firewall port 9100 on the Linux host"
+    sudo apt install firewalld -y
+    systemctl start firewalld
+    firewall-cmd --zone=public --permanent --add-port 9100/tcp
+else
+    sudo ufw allow 9100/tcp
+    sudo ufw reload
+fi
+
+cd node_exporter-*.*-amd64
+nohup ./node_expoprter --web.listen-address=":9100" &
+```
+
 ## Prerequisites to enable secure communication
 
 To [enable TLS 1.2 or higher](enable-tls-azure-monitor-sap-solutions.md), follow the steps [mentioned here](https://prometheus.io/docs/guides/tls-encryption/)
@@ -90,6 +110,13 @@ When the provider settings validation operation fails with the code ‘Prometheu
 1. Run `sudo crontab -e` command to open cron file.
 1. Add the command `@reboot cd /path/to/node/exporter && nohup ./node_exporter &` at the end of cron file. This will start node exporter on VM reboot.
 
+```shell
+sudo crontab -l > crontab_new
+echo "@reboot cd /path/to/node/exporter && nohup ./node_exporter &" >> crontab_new
+sudo crontab crontab_new
+sudo rm crontab_new
+```
+
 ## Next steps
 
 > [!div class="nextstepaction"]