add: prometheus

prometheus/README.md

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+
+# prometheus
+
+## install prometheus
+
+https://www.youtube.com/watch?app=desktop&v=yrscZ-kGc_Y&ab_channel=Techdox
+
+## install node_exporter 
+
+wget https://github.com/prometheus/node_exporter/releases/download/v1.8.2/node_exporter-1.8.2.linux-amd64.tar.gz

prometheus/node-exporter.md

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+# Setting Up Node Exporter
+
+## Download Node Exporter
+
+Begin by downloading Node Exporter using the wget command:
+
+```bash
+wget https://github.com/prometheus/node_exporter/releases/download/v1.7.0/node_exporter-1.7.0.linux-amd64.tar.gz
+```
+
+Note: Ensure you are using the latest version of Node Exporter and the correct architecture build for your server. The provided link is for amd64. For the latest releases, check here - Prometheus Node Exporter Releases
+
+## Extract the Contents¶
+
+After downloading, extract the contents with the following command:
+
+```bash
+tar xvf node_exporter-1.7.0.linux-amd64.tar.gz
+```
+
+## Move the Node Exporter Binary¶
+
+Change to the directory and move the node_exporter binary to /usr/local/bin:
+
+```bash
+cd node_exporter-1.7.0.linux-amd64
+```
+
+```bash
+sudo cp node_exporter /usr/local/bin
+```
+
+Then, clean up by removing the downloaded tar file and its directory:
+
+```bash
+rm -rf ./node_exporter-1.7.0.linux-amd64
+```
+
+## Create a Node Exporter User¶
+
+Create a dedicated user for running Node Exporter:
+```bash
+sudo useradd --no-create-home --shell /bin/false node_exporter
+```
+
+Assign ownership permissions of the node_exporter binary to this user:
+```bash
+sudo chown node_exporter:node_exporter /usr/local/bin/node_exporter
+```
+
+## Configure the Service¶
+
+To ensure Node Exporter automatically starts on server reboot, configure the systemd service:
+
+```bash
+sudo nano /etc/systemd/system/node_exporter.service
+```
+
+Then, paste the following configuration:
+
+```properties
+[Unit]
+Description=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
+Restart=always
+RestartSec=3
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Save and exit the editor.
+
+## Enable and Start the Service¶
+
+Reload the systemd daemon:
+
+```bash
+sudo systemctl daemon-reload
+```
+
+Enable the Node Exporter service:
+```bash
+sudo systemctl enable node_exporter
+```
+
+
+Start the service:
+
+```bash
+sudo systemctl start node_exporter
+```
+
+To confirm the service is running properly, check its status:
+
+```bash
+sudo systemctl status node_exporter.service
+```