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:
 * extras:
 * rpmforge:
  Installing : iftop-1.0-0.pre3.el6.rf.x86_64                                                            1/1
  Verifying  : iftop-1.0-0.pre3.el6.rf.x86_64                                                            1/1
  iftop.x86_64 0:1.0-0.pre3.el6.rf                                                                           

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’.


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Tags: Network Monitoring Monitoring tool iftop
user image Author :  Jacob