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As network administrators or just curious users, it’s vital to keep an eye on the bandwidth usage to ensure efficient network operations. Whether you're troubleshooting a slow network or ensuring no unauthorized traffic is consuming your bandwidth, knowing what's happening on your network interface is essential. This is where iftop becomes an indispensable tool. iftop is a real-time console-based network bandwidth monitoring tool, perfect for visualizing network traffic as it shows a list of network connections from or to your system. In this blog, we'll explore how to install and use iftop on various Linux distributions using apt, dnf, and zypper package managers, and provide a quick guide on how to interpret the data it presents.