Ubuntu – How to check if any background process is utilizing the internet connection

backgroundinternet

My internet speed is 4 Mbps. In Windows, I get 2 Mbps download bandwidth, but in Ubuntu 12.04 LTS I only get a maximum of 20 Kbps. Why is it so?

Is there any background process which might be utilizing the internet connection? If yes, then how do I know that?

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Best Answer

If you want the information in a Terminal you can run sudo lsof -i which will tell you all open internet connections (and listening processes too).

Your screenshot shows no anomaly, nothing unexpected (except maybe tomcat). So take one more step to investigate: you are going to look at actual bandwidth used in any connection with external hosts.

For this you need to

install iftop by typing sudo apt-get install iftop
run it with sudo iftop (or maybe sudo iftop -i wlan0 if the first command gives an error)

You will get a picture like

enter image description here

where the top line shows the overall used bandwidth (here very little bandwidth is used at the moment).

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Ubuntu – Detect internet connection

The command ip link show shows the status of available interfaces. At least one of the interfaces on needs be listed as UP in order for you to have any connectivity at all.

The command ip neigh show shows local link state, like this:

192.168.0.1 dev eth0 lladdr 00:15:e9:ec:cc:80 REACHABLE

You need at least one REACHABLE to have network access.

The command ip addr show shows all interfaces and their IP addresses.

Once you have a local IP address and a neighbor's IP address, you can then use ping or another tool to verify local IP connectivity.

Upgrading Ubuntu with Multiple Connections – How to Use wget

Yes it is, using a program that is called apt-fast, How to from this site http://www.webupd8.org/2010/08/you-can-now-install-apt-fast-from-ppa.html

First run theses commands in terminal, put one line in at a time and hit enter, enter password when prompted.

sudo add-apt-repository ppa:tldm217/tahutek.net
sudo apt-get update
sudo apt-get install apt-fast

After it is installed you can use apt-fast just like apt-get aka sudo apt-fast upgrade

They say it is a full syntax replacement, so try it with any situation you would use apt-get I haven't had it fail yet, but if something does go wrong try apt-fast clean , by default it has like 4 connections, I read here that you can customize it for more here http://nvarona.blogspot.com/2011/01/accelerating-ubuntu-apt-get.html

Best Answer

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Ubuntu – Detect internet connection

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