While iftop is running, you can press any one of the following keys to display more output. You can also specify a particular interface with the -i option as shown below. The default iftop command displays the bandwidth usage of the first ethernet device. If you prefer to install it from binaries, please visit the iftop website to download the binaries. Note: If you get “can’t find pcap.h” or “ncurses mvchgat” error message, please see the troubleshooting section below on how to fix that issue. iftop monitors your network activity, and displays a table of current bandwidth.ĭownload the source code form the iftop website.To find out which process is causing the problem, note down the port number from the iftop and use netstat -p to identify the process.Using iftop you can identify which host is responsible for slowing down your network.iftop displays the network usage of a specific interface on the host.iftop command displays real-time network bandwidth usage. top command displays real-time CPU Usage. iftop (interface top) derives the name from the standard unix top command.This article provides an overview of iftop, installation instructions, sample usage example and screenshots of iftop. Iftop output shows the data transfer rate, both for data sent and received, for the past 2 seconds, 10 seconds, and 40 seconds. iftop shows the pair of hosts which is responsible for the most traffic at the top of list, which makes it easier to identify the hosts that causes network congestion. It shows a table of current bandwidth usage by hosts. Monitoring your network is an easy task with iftop. This is a guest post written by SathiyaMoorthy.
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