- libpcap : module provides a user-level network packet capture information and statistics.
- libncurses : is a API programming library that enables programmers to provide text-based interfaces in a terminal.
Install libpcap and libncurses
Installation of the libpcap and libncurses library with YUM command as shown below for error-free iftop installation.
# yum -y install libpcap libpcap-devel ncurses ncurses-devel
Download and Install IFTOP
Download iftop from it’s website with Wget command as shown below.
# wget http://www.ex-parrot.com/pdw/iftop/download/iftop-0.17.tar.gz
# tar -zxvf iftop-0.17.tar.gz # cd iftop-0.17 # ./configure # make # make install
Basic usage of Iftop
Once installation done, go to your console and type iftop command.
Sample output of iftop command which shows bandwidth of default interface as shown below.
Monitoring Specific Interface
You can give a specific interface to monitor with -i option.
# iftop -i eth0
Iftop Options and Usage
While running iftop you can use the keys like S, D to see more information like source, destination etc. Please do man iftop if you want to explore more options and tricks. Press ‘q‘ to quit from running windows.
Iftop shows the network usage and bandwidth as ‘top’ command show’s the CPU usage of your computer.