Ubuntu – How to monitor which application is consuming the network

networkingUbuntu

In Ubuntu I can see the total network usage from the 'System Monitor', but how do I know which application is consuming the network bandwidth? I would like to know the network consumption at a particular time per application.

Best Answer

Command like nethogs can be used for the requirement. You can install it using sudo apt-get install nethogs from the command line.

NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet, like most tools do, it groups bandwidth by process. NetHogs does not rely on a special kernel module to be loaded. If there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. This makes it easy to indentify programs that have gone wild and are suddenly taking up your bandwidth.

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Linux – In linux, how can you tell which processes use the most network bandwidth

nethogs does this. All you need to do is run it as root and possibly give it your network interface name as an argument if it doesn't default to the correct one.

Linux – How do determine how much bandwidth a process is using in Linux

You can use

iptraf

iftop -P

to identify connections that consume much of your bandwidth. A connection is identified by a pair of (localip:port, remoteip:port). You can then use

netstat -tunp

to look up what process uses that connection. Mostly however, you will be able to tell what service is responsible only by looking at the port, e.g. if the connection uses localip:80 on the local side its probably your webserver ;-)

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Linux – In linux, how can you tell which processes use the most network bandwidth

Linux – How do determine how much bandwidth a process is using in Linux

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