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How to monitor network bandwidth using Iftop

Monitoring Network Bandwidth by using Iftop

Iftop is defined as an Interface Top. It is a command-line system monitoring tool that produces a frequently-updated list of network connections. It is a real time network bandwidth monitoring tool that displays a quick overview of network activities.


To Install Iftop

[root@linuxhelp Desktop]# yum install iftop
Loaded plugins: aliases, changelog, fastestmirror, kabi, presto, refresh-packagekit, security, tmprepo,
              : verify, versionlock
Loading support for CentOS kernel ABI
Setting up Install Process
Loading mirror speeds from cached hostfile
 * base: centos.webwerks.com
 * extras: centos.webwerks.com
 * rpmforge: mirror.oscc.org.my
.
.
.
  Installing : iftop-1.0-0.pre3.el6.rf.x86_64                                                            1/1
  Verifying  : iftop-1.0-0.pre3.el6.rf.x86_64                                                            1/1
Installed:
  iftop.x86_64 0:1.0-0.pre3.el6.rf                                                                           
Complete!

Run the iftop command to monitor the network bandwidth.

[root@linuxhelp Desktop]# iftop

Press option ‘ S’ to view the port number of the source host.

Press option ‘ D’ to view the port number of the destination host.

To display both source and destination port number press ‘ p’ .

To Pause iftop press ‘ P’ .

To hide the source host ip address press ’ s’ .

To hide the destination host ip address press ‘ d’ .

To hide the statistics bar press ‘ b’ .

To display the cumulative totals press ‘ T’ .

Tag : Network Monitoring Monitoring tool iftop
FAQ
Q
How to set do not display the bar graphs of traffic in "iftop"?
A
Use the option of "-b" with "iftop" command to set do not display the bar graphs of traffic in "iftop". For syntax: "iftop -b"
Q
How do I know the entire information and option will be available for "Foreman"?
A
For getting the information and option to be available for "iftop", execute the following command on the terminal "https://projects.theforeman.org/projects/foreman/wiki/Database_configuration"
Q
How to install Iftopn on Linuxmint?
A
The following tutorial will explain the installation of "iftop" on Linuxmint as "https://www.linuxhelp.com/how-to-install-iftop-and-use-it-on-linux-mint-18-3/"
Q
What is the Alternative tool available for the Iftop?
A
The following tools are alternative for the "iftop",
Nload, Iptraf, nethogs, bmon and etc.,
Q
How to Display bandwidth rates in bytes/sec using the "iftop" command?
A
For getting the information of bandwidth rates in bytes/sec using the "iftop" command, use the syntax as follow " iftop -B"