What command can be used to monitor real-time network connections in Linux?

Monitoring real-time network connections in Linux can be accomplished using various commands, each with specific features suitable for different monitoring needs.

The command "netstat -tuln" provides a snapshot of current TCP/UDP connections and listening ports, displaying information such as the protocol, local address, remote address, and state. However, it does not provide real-time information, as it gives only the state of the network connections at the time the command is run.

"iftop" is another tool that visualizes bandwidth usage on an interface, showing real-time data about network connections, including source and destination IP addresses along with their respective data transfer rates. This makes it highly effective for monitoring ongoing connections in real-time.

"tcpdump" is a powerful command-line packet analyzer that captures network packets in real time. It allows users to see the traffic flowing through the network, making it useful for detailed analysis and troubleshooting of network interactions.

Since each of these commands can contribute to monitoring network connections and activity, stating that all listed options can be used serves to highlight the variety of tools available for different aspects of network monitoring in a Linux environment. Hence, recognizing that each tool complements the others provides a comprehensive approach to effectively monitoring network connections.