How to Monitor Linux System Performance with Netdata on Ubuntu Server

Learning how to monitor Linux system performance with Netdata on Ubuntu Server is one of the smartest moves you can make as a server administrator. Netdata gives you real-time visibility into CPU usage, memory consumption, disk I/O, and network traffic , all from a clean web dashboard. Without proper monitoring, small problems can quietly grow into major outages. This tutorial walks you through installing and configuring Netdata from scratch. You’ll learn how to access the live dashboard, configure basic alerts, and keep your server running smoothly. Whether you’re managing a personal VPS or a production web server, Netdata makes it easy to spot performance problems before they affect your users.

Prerequisites for How to Monitor Linux System Performance with Netdata on Ubuntu Server

Before you start, make sure your environment meets these requirements.

What you need:

– Ubuntu Server 20.04 or 22.04 (fresh or existing installation)
– A non-root user with sudo privileges
– At least 1GB of RAM (2GB recommended)
– Basic familiarity with the Linux command line
– SSH access to your server
– An open firewall port 19999 for dashboard access

Estimated time: 20–30 minutes

You don’t need to be a Linux expert. If you can run commands over SSH, you’re ready. Netdata installs with a single script and requires very little manual configuration. It works on most Ubuntu-based systems without extra dependencies. For reference, check the official Ubuntu Server documentation if you need help setting up your initial server environment before proceeding.

Step-by-Step Guide to Monitor Linux System Performance with Netdata on Ubuntu Server

For more strange history, see: How to Set Up Automated Mysql Backups with Cron Jobs

Follow these steps carefully. Each one builds on the previous.

Step 1: Update your system packages

Always start with a full system update. This prevents compatibility issues during installation.

sudo apt update && sudo apt upgrade -y

Wait for the upgrade to finish before moving on.

Step 2: Install Netdata using the official kickstart script

Netdata provides an automated installer. This is the fastest and most reliable method.

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

The script detects your OS automatically. It installs all required dependencies and starts the Netdata service. The whole process takes about 2–5 minutes depending on your connection speed.

Step 3: Verify the Netdata service is running

After installation, confirm the service started correctly.

sudo systemctl status netdata

You should see active (running) in the output. If the service isn’t running, start it manually:

sudo systemctl start netdata
sudo systemctl enable netdata

The enable command ensures Netdata starts automatically after a reboot.

Step 4: Open port 19999 in your firewall

Netdata’s dashboard runs on port 19999. You need to allow traffic on that port.

sudo ufw allow 19999/tcp
sudo ufw reload

If you’re using a cloud provider like AWS or DigitalOcean, also open port 19999 in your cloud firewall or security group settings.

Step 5: Access the Netdata dashboard

Open a browser and navigate to your server’s IP address with port 19999.

http://YOUR_SERVER_IP:19999

Replace YOUR_SERVER_IP with your actual server IP address. You’ll see the live Netdata dashboard immediately. It shows real-time graphs for CPU, RAM, disk, and network , all updating every second.

Step 6: Configure a basic alert notification

Netdata includes a built-in alert system. You can configure email alerts by editing the health configuration.

sudo nano /etc/netdata/health_alarm_notify.conf

Find the email section and update these values:

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

Save the file with CTRL+X, then Y, then Enter. Restart Netdata to apply the changes:

sudo systemctl restart netdata

Step 7: Restrict dashboard access for security

Leaving port 19999 open to the public is a security risk. You can restrict access to specific IP addresses.

Edit the Netdata configuration file:

sudo nano /etc/netdata/netdata.conf

Under the [web] section, add your allowed IP:

[web]
    bind to = 127.0.0.1
    allow connections from = localhost YOUR_IP_ADDRESS

Save and restart Netdata. For production servers, consider putting Netdata behind an Nginx reverse proxy with password authentication. Check the official Netdata documentation for detailed proxy configuration examples.

Step 8: Explore built-in dashboards and metrics

Netdata automatically detects running services on your server. If you run Apache, Nginx, MySQL, or Redis, Netdata creates dedicated dashboards for each. No extra plugins needed. Browse the left sidebar in the dashboard to find all available metric categories.

Troubleshooting Common Issues When Monitoring Linux System Performance with Netdata

Even with a smooth installation, you might hit a few snags. Here are the most common problems and how to fix them.

Problem: Dashboard won’t load in the browser

First, check if Netdata is actually running:

sudo systemctl status netdata

If it’s stopped, start it. Then double-check your firewall rules with:

sudo ufw status

Make sure port 19999 appears in the allowed list.

Problem: High CPU usage from Netdata itself

Netdata is lightweight, but it can spike on very small servers. Reduce its update frequency by editing /etc/netdata/netdata.conf:

[global]
    update every = 5

This changes the collection interval from 1 second to 5 seconds. It significantly reduces CPU load on low-resource servers.

Problem: Installation script fails

If the kickstart script fails, try the manual apt installation instead:

sudo apt install netdata -y

The apt version may be slightly older, but it works reliably on Ubuntu 20.04 and 22.04.

Problem: Email alerts aren’t sending

Make sure your server has a working mail transfer agent installed. Install one with:

sudo apt install postfix -y

Choose “Internet Site” during setup. Then test your alert configuration by running:

sudo -u netdata /usr/libexec/netdata/plugins.d/alarm-notify.sh test

You can also connect Netdata to Slack, PagerDuty, or other services. See the Netdata alert notifications guide for the full list of supported integrations.

Conclusion

You now know how to monitor Linux system performance with Netdata on Ubuntu Server. You installed Netdata, accessed the real-time dashboard, configured basic alerts, and secured your setup. This gives you full visibility into what your server is doing at any moment. Netdata is one of those tools that pays for itself immediately. You’ll catch memory leaks, CPU spikes, and disk space issues before they cause downtime. As a next step, consider setting up Netdata Cloud to monitor multiple servers from a single interface. You might also want to explore setting up Nginx as a reverse proxy in front of the Netdata dashboard. Keep monitoring, keep optimizing, and your server will thank you for it.

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