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Netdata provides a real-time, highly detailed web dashboard showing CPU, memory, disk, network, and per-process metrics with almost no configuration required — ideal for quickly understanding what's actually happening on your VPS at any moment.

Prerequisites

• Ubuntu 22.04/24.04 or Debian 11/12 VPS
• Root or sudo access

Step 1 — Install Netdata Using the Official Script

wget -O /tmp/netdata-kickstart.sh https://get.netdata.cloud/kickstart.sh
sh /tmp/netdata-kickstart.sh

Step 2 — Verify the Service Is Running

sudo systemctl status netdata

Step 3 — Access the Dashboard

By default, Netdata listens on port 19999:

http://YOUR_SERVER_IP:19999

Step 4 — Restrict Public Access (Important)

The dashboard shouldn't be publicly exposed by default — restrict it to trusted IPs at the firewall level:

sudo ufw deny 19999/tcp
sudo ufw allow from YOUR_TRUSTED_IP to any port 19999

Alternative: Access via Nginx Reverse Proxy with Authentication

location /netdata/ {
    auth_basic "Restricted";
    auth_basic_user_file /etc/nginx/.htpasswd;
    proxy_pass http://127.0.0.1:19999/;
}

What Netdata Shows Out of the Box

• Per-core CPU usage
• Memory usage, including cache/buffer breakdown
• Disk I/O and space usage per mount point
• Network traffic per interface
• Per-process resource consumption
• Automatic detection of running services (Nginx, MySQL, Docker) with service-specific metrics

Configuring Alerts

Netdata includes sensible default alert thresholds out of the box (high CPU, low disk space, etc.). Customize them:

sudo /etc/netdata/edit-config health_alarm_notify.conf

Setting Up Email Notifications

sudo nano /etc/netdata/health_alarm_notify.conf

SEND_EMAIL="YES"
DEFAULT_RECIPIENT_EMAIL="[email protected]"

sudo systemctl restart netdata

Reducing Netdata's Own Resource Usage

On smaller VPS plans, Netdata's default data retention can use noticeable RAM. Reduce it:

sudo nano /etc/netdata/netdata.conf

[global]
    history = 1800

sudo systemctl restart netdata

Common Errors

Dashboard inaccessible — confirm the firewall rule allows your specific IP on port 19999.

Netdata using significant CPU/RAM on a small VPS — reduce history retention and disable plugins for services you don't run, via /etc/netdata/netdata.conf.

Best Practices

• Never expose the dashboard publicly without authentication or IP restriction
• Configure alert notifications so you're proactively informed of issues
• Reduce retention/history settings on smaller VPS plans to limit overhead

Related Articles

• How to Check VPS Resource Usage (CPU, RAM & Disk)
• How to Set Up Uptime Monitoring for Your Website
• How to Configure UFW Firewall on a Linux VPS