Bandwidth Monitoring Tools for Ubuntu Users

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Bandwidth in computer networking refers to the data rate supported by a network connection or interface. One most commonly expresses bandwidth in terms of bits per second (bps). The term comes from the field of electrical engineering, where bandwidth represents the total distance or range between the highest and lowest signals on the communication channel (band).

Bandwidth represents the capacity of the connection. The greater the capacity, the more likely that greater performance will follow, though overall performance also depends on other factors, such as latency.

Here is the list of bandwidth monitoring tools for your network bandwidth


Now we will see each tool separately


bmon is a portable bandwidth monitor and rate estimator running on various operating systems. It supports various input methods for different architectures.

Various output modes exist including an interactive curses interface, lightweight HTML output but also formatable ASCII output

Current Stable Version :- 2.1.0

Install bmon in Ubuntu

sudo apt-get install bmon

This will complete the installation.

If you want to open the application you need to enter the following command


you should see the following output

If i select the eth0 i should see all the traffic details

If you want to know more available options check man page


This program will output a PNG and a text file that can be used in scripts or be included in web pages to show current bandwidth usage. The amount of total bandwidth can be customized. The PNG output appears as a bar graph showing maximum possible usage with the current inbound or outbound usage shown as a differently colored bar.

Current Stable Version :- 1.2.3

Install bwbar in ubuntu

sudo apt-get install bwbar

This will complete the installation

There is a /etc/default/bwbar file to configure before this package will work and here is my config

# Directory to put files into
# Who to run as
# What are the options (eth0, scale of 1.5mbps)
OPTIONS="eth0 1.5″

Now you need to chnage the permissions using the following command

sudo chown -R www-data:www-data /var/www/bwbar/

Start the bwbar using the following command

sudo /etc/init.d/bwbar start

You can also launch bwbar using the following command

bwbar eth0 100 -x 200 -y 7 -t 10 -p network.png -f network.txt -d /var/www/bwbar &

Now you need to go to http://serverip/bwbar you should see the bandwidth bar as follows

If you want to know about available option check man page


BandWidth Monitor This is a very tiny bandwidth monitor (not X11). Can monitor up to 16 interfaces in the in the same time, and shows totals too.

Current Stable Version :- 1.1.0

Install bwm ubuntu

sudo apt-get install bwm

This will complete the installation now

If you want to run the application use the following command


Output looks like below

If you want more details and available options check man page


small and simple console-based bandwidth monitor.Bandwidth Monitor NG is a small and simple console-based live bandwidth monitor.

Current Stable Version :- 0.5


supports /proc/net/dev, netstat, getifaddr, sysctl, kstat and libstatgrab

unlimited number of interfaces supported

interfaces are added or removed dynamically from list

white-/blacklist of interfaces

output of KB/s, Kb/s, packets, errors, average, max and total sum

output in curses, plain console, CSV or HTML


Install bwm-ng in ubuntu

sudo apt-get install bwm-ng

This will complete the installation

If you want to run the application you need to use the following command


Output looks like below

If you want more details and available options check man page


iftop does for network usage what top does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts.

Current Stable Version :- 0.17

Install iftop in ubuntu

sudo apt-get install iftop

This will complete the installation

If you want to run the application you need to use the following command


Output looks like below

If you want more details and available options check man page


IP Flow Meter (IPFM) is a bandwidth analysis tool, that measures how much bandwidth specified hosts use on their Internet link.

Current Stable Version :- 0.11.5

Install ipfm in Ubuntu

sudo apt-get install ipfm

This will complete the installation

Now if you want to configure this for your network you need to copy example configuration file from /usr/share/doc/ipfm/examples if you want to check this file click here

once you configure this file you need to start the service using the following command

sudo /etc/init.d/ipfm start

If you want more details and available options check man page


Measure and display the rate of data across a network connection or data being stored in a file.

Current Stable Version :- 2.4

Install speedometer in ubuntu

Check which version of python is the default by running

python -V

Then issue the following commands as root to install speedometer (choose the correct Urwid package for your python version, ie. if python -V reports version 2.3.X then install python2.3-urwid)

apt-get install python2.4-urwid

Download the source file.

As user issue the following commands in the directory that you downloaded the source file

sudo cp /usr/local/bin/speedometer

sudo chown root: /usr/local/bin/speedometer

sudo chmod 755 /usr/local/bin/speedometer

Now you can run the speedometer application using the following


Now you should see the following screen output

Speedometer Usage

Usage: speedometer [options] tap [[-c] tap]

Available options

speedometer -h

Usage: speedometer [options] tap [[-c] tap]...

Monitor network traffic or speed/progress of a file transfer. At least one tap must be entered. -c starts a new column, otherwise taps are piled vertically.


[-f] filename [size] display download speed [with progress bar]

-f must be used if directly following another

file tap without an expected size specified

-rx network-interface display bytes received on network-interface

-tx network-interface display bytes transmitted on network-interface


-i interval-in-seconds eg. "5" or "0.25" default: "1"

-p use plain-text display (one tap only)

-b use old blocky display instead of smoothed display even when UTF-8 encoding is detected

-z report zero size on files that don't exist instead of waiting for them to be created

Usage Examples

How long it will take for my 38MB transfer to finish?

speedometer favorite_episode.rm $((38*1024*1024))

How quickly is another transfer going?

speedometer dl/big.avi

How fast is this LAN?

$ cat /dev/zero | nc -l -p 12345

$ nc host-a 12345 > /dev/null

$ speedometer -rx eth0

How fast is the upstream on this ADSL line?

speedometer -tx ppp0

How fast can I write data to my filesystem? (with at least 1GB free)

dd bs=1000000 count=1000 if=/dev/zero of=big_nothing &
speedometer big_nothing


cbm — the Color Bandwidth Meter — displays the current traffic on all network devices.

Current Stable Version :- 0.1-1

Install cbm in ubuntu

First you need to download the .deb package from here

once you have the .deb package you need to install using the following comamnd

sudo dpkg -i cbm_0.1-1_i386.deb

this will complete the installation now if you want to use the appltcation use the following command


Output looks like below


pktstat listens to the network and shows the bandwidth being consumed by packets of various kinds in realtime. It understands some protocols (including FTP,HTTP, and X11) and adds a descriptive name next to the entry (e.g., ‘RETR cd8.iso', ‘GET' or ‘xclock -fg blue').

Current Stable Version :- 1.8.3

Install pktstat in Ubuntu

First you need to download .rpm package from here once you have the .rpm package you need to convert this .rpm file to .deb file using alien

Install alien

sudo apt-get install alien

Now you need to use the follwoing command to convert .rpm to .deb

sudo alien -k pktstat-1.7.2q-0.i386.rpm

Now you should be having pktstat_1.7.2q-0_i386.deb package

Install pktstat in Ubuntu

sudo dpkg -i pktstat_1.7.2q-0_i386.deb

This will complete the installation now you can open the application using the following command


output looks like below

If you want more available options for pktstat check man page


ibmonitor is an interactive linux console application which shows bandwidth consumed and total data transferred on all interfaces.

Current Stable Version :- 1.4

Its main features are:

Shows received, transmitted and total bandwidth of each interface

Calculates and displays the combined value of all interfaces

Displays total data transferred per interface in KB/MB/GB

Values can be displayed in Kbits/sec(Kbps) and/or KBytes/sec(KBps)

Can show maximum bandwidth consumed on each interface since start of utility

Can show average bandwidth consumption on each interface since start of utility

The output with all features (max, avg and display in Kbps and KBps) easily fits on a 80×24 console or xterm

Can interactively change its output display format depending on key pressed by user.

Install ibmonitor in Ubuntu

First you need to download the latest version from here


Now you have ibmonitor-1.4.tar.gz

Extract this file using the following commands

tar xvfz ibmonitor-1.4.tar.gz

cd ibmonitor

If you want to run the application use the following command

Once you are in ibmonitor folder use


Output looks like the following screen


While tools to measure network performance, such as ttcp, exist, most are very old and have confusing options. Iperf was developed as a modern alternative for measuring TCP and UDP bandwidth performance.

Iperf is a tool to measure maximum TCP bandwidth, allowing the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

Current Stable Version :- 2.0.2

Install iperf in ubuntu

sudo apt-get install iperf

iperf Syntax

iperf [-s|-c host] [options]


iperf -c server address -F file-name

iperf -c server address -I

The -F option is for file input.

The -I option is for input from stdin.

If you want more details and available options check man page


tcptrack is a sniffer which displays information about TCP connections it sees on a network interface. It passively watches for connections on the network interface, keeps track of their state and displays a list of connections in a manner similar to the unix ‘top' command. It displays source and destination addresses and ports, connection state, idle time, and bandwidth usage.

Current Stable Version :- 1.1.5

Install tcptrack in Ubuntu

sudo apt-get install tcptrack

this will complete the installation

tcptrack Syntax

tcptrack [-dfhvp] [-r ] -i []


tcptrack requires only one parameter to run: the -i flag followed by an interface name that you want tcptrack to monitor. This is the most basic way to run tcptrack

tcptrack -i eth0

tcptrack can also take a pcap filter expression as an argument. The format of this filter expression is the same as that of tcpdump and other
libpcap-based sniffers. The following example will only show connections from host

tcptrack -i eth0 src or dst

The next example will only show web traffic (ie, traffic on port 80)

tcptrack -i eth0 port 80

The following output screen will show you more details


The Multi Router Traffic Grapher or just simply MRTG is free software for monitoring the traffic load on network links. It allows the user to see traffic load on a network over time in graphical form.

Current Stable Version :- 2.15.0

Project Homepage


Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive,easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.

Current Stable Version :- 0.8.6i

Project Homepage

Regarding MRTG and Cacti i am going write detailed articles in future

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40 Responses

  1. rdeman says:

    aren’t there any nice Gnome GUI graphical versions of these tools?

  2. countdrunkula says:

    Don’t forget jnettop.

  3. Dag Wieers says:

    You may want to add dstat and ifstat to your list of bandwidth monitoring tools. (Shameless plug since I wrote dstat)

    With dstat you can monitor lots of different hardware and software counters and you can add your own plugins to show your own counters.

    Output is in color. Here is an example showing time, cpu and network counters.

    [dag@rhun ~]# dstat -tcnf 5
    —–time—– ——-cpu0-usage—— –net/eth1-
    date/time |usr sys idl wai hiq siq| recv send
    21-12 18:58:59| 19 3 70 8 1 0| 0 0
    21-12 18:59:04| 1 0 99 0 0 0| 61B 51B
    21-12 18:59:09| 8 1 91 0 0 0| 99B 40B

    ifstat is similar in output, here’s what you’ll get.

    [dag@rhun ~]# ifstat -i eth1 5
    KB/s in KB/s out
    0.04 0.03
    0.03 0.04
    0.03 0.03
    0.09 0.05

    Both tools have some interesting options to make the output more useful.

    iptraf is another curses tool that is fairly useful as well.

  4. fatal says:

    For an easy to install application which publishes (per ip) web graphs see bandwidthd.

  5. Peter says:

    nload is another simple and effective monitor with a few configuration options.

  6. Chris Cox says:

    Some may want to measure bandwidth rather than monitoring. We use iperf.

  7. mieses says:

    Are any of these tools able to distinguish traffic on multiple virtual ip addresses sharing one ethernet interface? (eth0, eth0:1, eth0:2, etc)

  8. dune73 says:

    Do not forget ntop. It’s really a great tool.

    But otherwise the wide selection of CLI tools you present is impressive.

  9. Carla Schroder says:

    Nice article. And don’t forget these work on all Linuxes, not just Ubuntu.

  10. Ben Woods says:

    For a good network monitoring applet for gnome, have a look at netspeed:

    It has a great interface and is superior to netmon-applet ( as it can display a graph of previous usage and has an option to “always display a connected device” which will automatically switch to your connected device if it changes.

  11. Carsten Senger says:

    When you look at MRTG and Cacti in detail I would love to read how Munin compares to them.

  12. Jason Straight says:

    Yes, don’t forget jnettop. I’ve tried all the others and jnettop is the one I find most useful. It shows you how much bandwidth each IP connection is using, you can aggregate to see how much of what types of traffic or what host is using the most. Sort by RX or TX, and use tcpdump filters.

  13. Toby Haynes says:

    The venerable (but still actively maintained) GNOME Krell Monitor (a.k.a. gkrellm) provides per-interface and per-service network usage graphs in real time. It remains a standard install for me on almost all of my machines, especially now it has a client-server architecture so you can monitor multiple machines simultaneously.

  14. David K says:

    gdesklets eye candy includes a number of beautiful little graphical representations of current bandwidth usage as well as total throughput. These are usually configurable on a per network device basis.

    My preferred one is the SideCandy network monitor for gdesklets.

    Automatix can install gdesklets too, so it’s very easy for new users to get up and running.

  15. And for in-depth monitoring, graphs, dashboards, thresholds, … even capacity planning, see

  16. Ashley Pritchard says:

    I can’t believe you haven’t mentioned iptraf.

    Please apt-get install it and take a look – it’s a beautiful ncurses bandwidth monitor.

  17. dajul says:

    A tool for displaying daily and monthly bandwidth:

    apt-get install vnstat

  18. Rod Tye says:

    I’m surprised no-one’s mentioned pload. It’s the best bandwidth monitoring tool
    I’ve come across. Although the man page says it’s for measuring ppp throughput,
    it works with any network interface.

  19. There’s also Hendrik Scholz’ slurm, for those who need some console graphics. It’s in FreeBSD ports and Debian…

  20. Robert Brunne says:

    Here’s my favourite for a snapshot of heavy downloaders…

    potion – IP Flow Monitor

    apt-get install potion

  21. Zygron says:

    I have searched around for a while and can’t find what I am looking for.
    And I realise that I’m probably not at all welcome here due to the fact that I am a Windows user.
    If anyone is familiar with was I need it would be greatly appreciated.
    I’m currently running netlimiter pro on all of my computers at home which are all connected to the internet through a Netgear Wireless router (WGR614)
    I am very happy with the netlimiter program but what I want to be able to do is monitor how much bandwidth usage each computer (or device in the instance of my Nintedo DS and Nintendo Wii) is using and if possible to be able to monitor how much each program or process on each individual computer and be able to monitor it all on one program running on my main computer.
    Pretty much an extensive version of Netlimiter.
    Thank-you in advance for any help you can provide.

  22. fantasyl says:

    Same as Zygron here…..I’d like to monitor bandwidth usage for device and for EACH running process/task. A tool to monitor and assign a specified network bandwidth for each task does not exist in the beautiful unix world :(, does it?
    I’ll take a look at all the program mentioned before…..but already did a search a few months ago, and came up with nothing 🙁

    Any help appreciated!

  23. C Sincock says:

    In response to Tony’s slander about gkrellm :). The G in Gkrellm does not stand for GNOME – it stands for Gtk or GNU (as stated in the FAQ at the gkrellm site) (and you can see the logo has the words Gtk Monitors under it).

    Gtk != GNOME
    Gtk = good, GNOME = rubbish

    Anybody should be able to tell that gkrellm is not a GNOME application though, as it actually is configurable and is able to do handy stuff that people with a brain might want it to do. Any GNOME version of gkrellm would have long since had all features removed in favour of not confusing the ‘users’.

    Sorry to go a bit off-topic there.

  24. Jay says:

    Gnome panel has a “System Monitor” applet that displays processor load

    Right-click on the graph, and you can also add more graphs – including to display a rolling graph of your Network usage – very pretty and good for judging how much of your bandwidth you are using 🙂


  25. Steven Brady says:

    Thanks so much for this list. You’ve helped me out greatly!

  26. Sigmus says:

    I don’t see why system monitor isn’t good enough for these tasks, just add it to the panel in ubuntu and you’ve got yourself a real-time network meter!

  27. Greg says:


    I really need a tool to understand my home’s (i.e. various PCs/Xbox etc) usage of my internet allocation. I run a linux based firewall. Are there any good linux based software packages you could recommend for this? (i.e. all my traffic goes through my PC firewall at the moment, i.e. with 2 NIC cards). What I’m after is:

    [1] Tool that summarises my family’s internet bandwidth usage (on ppp0) per internal IP address/PC, per day, per upload/download?

    [2] As a bonus it would be great if the report [1] above could also be configured to break down the traffic based on hours of the day, i.e. to compare against the ISP Peak & OffPeak bandwidth limits.


  28. admin says:


    i would recommend cacti which can do all you are looking for

  29. skada says:

    is there a tool which can monitor bandwidth usage per subnet ?

    My connection is

    I wish to see bandwidth consumed per user here. Anyway posible?

  30. Bradford Mitchell says:

    pktstat is in the Ubuntu repos now, no need for alienating it from an rpm. Just installed it today.

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