By leveraging the pcap library, Iftop locates the packets moving out of a network adapter, and then tallies up the size to determine total bandwidth being used within the network. Iftop measures network traffic on a given interface and displays a table of current bandwidth usage via host groupings. There are other command line tools that are more apt for individual processes, but Nload is one of the more popular options for those who want to easily monitor total bandwidth usage. By sharing bandwidth usage in graph form, Nload makes it easy to view each lane of traffic while also providing additional info such as the total amount of transferred data and minimum/maximum network thresholds. Nload is a console application that allows users to utilize real-time monitoring of ingoing and outgoing network traffic. With so many different Linux command line tools available, let’s look at the ones that are most effective in monitoring and generating information regarding network usage. Having a single monitoring solution to oversee your Linux environment offers several benefits, but it is equally important to take advantage of the network monitoring tools existing within Linux. From measuring bandwidth usage to analyzing how an infrastructure is handling its workload, there are several metrics that do a great job of providing tangible insight when monitored in an efficient manner. It is available in deb/ubuntu and I think RHEL derivatives.For Linux monitoring, having the ability to easily monitor network traffic is a vital task. UPDATE2 OP says TCP and UDP is a requirement.
so you could do the above command and get the desired result. d specifies the time interval in between writes. You can do it with nethogs: nethogs -d 1 eth0 > output.txt
Up NetHogs and immediately see which PID is causing this, and if it's So if there's suddenly a lot of network traffic, you can fire Width by process - and does not rely on a special kernel module to be Per protocol or per subnet, like most such tools do, it groups band‐ You can also monitor multiple interfaces. However, its output is bandwidth per process, sent and received. You run it on the network interface, e.g. Debian/ubuntu/etc apt-get install nethogs
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