Linux Tools to see What Process consume Bandwidth

I have to day to day network troubleshoot and I need such a tool which shows what program consume the network bandwidth. So the Nethogs tool is small net top tool which fit exactly under my requirements. Here is the process to install and use of the tool.

The tool monitors traffic going to and from a machine, by per process basis.

jpudasaini@jpudasaini:~$ sudo apt-get install nethogs

*****Output*******

[sudo] password for jpudasaini:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
kde-l10n-engb linux-image-generic
Use 'apt-get autoremove' to remove them.
The following NEW packages will be installed:
nethogs
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 28.3 kB of archives.
After this operation, 105 kB of additional disk space will be used.
Get:1 http://np.archive.ubuntu.com/ubuntu/ saucy/universe nethogs amd64 0.8.0-1 [28.3 kB]
Fetched 28.3 kB in 0s (50.1 kB/s)
Selecting previously unselected package nethogs.
(Reading database ... 230384 files and directories currently installed.)
Unpacking nethogs (from .../nethogs_0.8.0-1_amd64.deb) ...
Processing triggers for man-db ...
Setting up nethogs (0.8.0-1) ...

You have install the tool. How to use the tool.

#sudo nethogs
#sudo nethogs eth0

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