4 Steps to setup Iftop Network Bandwidth Monitoring Tool on ubuntu 20.04 LTS

Iftop is a free & open source Network Bandwidth Monitoring Tool.It displays a fast overview of the networking activities on an interface.Iftop stand for Interface Top.It is a command line tool used for monitoring the network traffic on a network interface and shows a table of current bandwidth usage.

There are few steps to install Iftop on ubuntu:

Step 1: Update the System.

apt-get update

Step 2: Install the required packages.

apt install libpcap0.8 libpcap0.8-dev libncurses5 libncurses5-dev

Step 3: Install Iftop on system.

apt install iftop

Step 4: Iftop Syntx & Examples:

• To list the available options of Iftop.

iftop -h

• Here is the command output.

• To start the Iftop network monitoring tool to display bandwidth usage of default network interface.

iftop

• Here is the command output.

• To display all the network interface.Run the following command to view all available network interfaces.

ifconfig
OR
ip addr show

• To monitor the specific network interface.

iftop -i network_interface_name
iftop -i eth0

• Here is the command output.

• To disable the hostname lookups.

iftop -n -i eth0

• Here is the command output.

• To disable the conversion of port number to services.

iftop -N -i eth0

• Here is the command output.

• To disable the view of bar graph.

iftop -b

• Here is the command output.

• To view the text interface without ncurses.

iftop -t

• Here is the command output.

• Sort output by source address.

iftop -o source

• Here is the command output.

• Sort output by destination address.

iftop -o destination

• Here is the command output.

• To display only specify number of lines.

iftop -L 2 -i eth0

• Here is the command output.