Linux server. Network monitoring on Linux. This post mentions some linux command line tools that can be used to monitor the network usage. These tools monitor the traffic flowing through network interfaces and measure the speed at which data is currently being transferred. Incoming and outgoing traffic is shown separately. Some of the commands, show the bandwidth used by individual processes. This makes it easy to detect a process that is overusing network bandwidth. The tools have different mechanisms of generating the traffic report. Some of the tools like nload read the . Overall bandwidth - nload, bmon, slurm, bwm- ng, cbm, speedometer, netload. Overall bandwidth (batch style output) - vnstat, ifstat, dstat, collectl. Linux admins spend most of their time on working in a terminal; there are some who like to work on GUI instead of a terminal. For linux, we have gathered everything you need in one place. Clone the repository git clone https://github.com/linux-sunxi/sunxi-livesuite.git. Bandwidth per socket connection - iftop, iptraf, tcptrack, pktstat, netwatch, trafshow. Bandwidth per process - nethogs. Nload. Nload is a commandline tool that allows users to monitor the incoming and outgoing traffic separately. It also draws out a graph to indicate the same, the scale of which can be adjusted. Easy and simple to use, and does not support many options. So if you just need to take a quick look at the total bandwidth usage without details of individual processes, then nload will be handy. Cent. OS users need to get nload from Epel repositories.# fedora or centos. Iftop uses the pcap library to capture the packets moving in and out of the network adapter, and then sums up the size and count to find the total bandwidth under use. Linspire, previously known as LindowsOS, was a commercial operating system based on Debian GNU/Linux and later Ubuntu. Linspire was published by Linspire, Inc. I am using Linux Mint 13 (fully updated) installed all the packages listed in the article. Followed the tutorial and the commands work (sorta) but mail is never sent. Although iftop reports the bandwidth used by individual connections, it cannot report the process name/id involved in the particular socket connection. But being based on the pcap library, iftop is able to filter the traffic and report bandwidth usage over selected host connections as specified by the filter. Cent. OS users get it from Epel.# fedora or centos. Fix Yum Lock Errors. Symptom: When you attempt to install a package with yum, you get an error saying that "Another app is currently holding the yum lock.". We have already seen how to install different Linux OS through CD-ROM's. Below are the Linux os installations already covered so far. How to install Fedora Linux 17? It shows individual connections and the amount of data flowing between the hosts. Here is a screenshot$ sudo iptraf. Install iptraf# Centos (base repo). In the event of a sudden bandwidth spike, quickly open nethogs and find the process responsible. To install tcptraceroute on CentOS/REHL, first set up RepoForge on your system, and then.Nethogs reports the PID, user and the path of the program. Cent. OS users need Epel# ubuntu or debian (default repos). The output also consists of a graph and a section with packet level details. Install Bmon - Ubuntu, Debian and Fedora users can install from default repos. Cent. OS users need to setup repoforge, since its not available in Epel.# ubuntu or debian. Bmon supports many options and is capable of producing reports in html format. Check the man page for more information. It supports 3 different styles of graphs each of which can be activated using the c, s and l keys. Simple in features, slurm does not display any further details about the network load. It also supports the standard pcap filters that can be used to monitor specific connections. Install tcptrack - Ubuntu, Debian and Fedora have it in default repos. Cent. OS users need to get it from Repo. Forge as it is not available in Epel either.# ubuntu, debian. Vnstat. Vnstat is bit different from most of the other tools. It actually runs a background service/daemon and keeps recording the size of data transfer all the time. Next it can be used to generate a report of the history of network usage. It would then show the total bandwidth used by incoming and outgoing data, but in a very precise manner without any internal details about host connections or processes. It is not strictly a tool for monitoring the network in real time. Vnstat supports many options, details about which can be found in the man page. Install vnstat# ubuntu or debian. No further options, just the traffic stats are display and updated in realtime. Pktstat. Pktstat displays all the active connections in real time, and the speed at which data is being transferred through them. It also displays the type of the connection, i. Netwatch. Netwatch is part of the netdiag collection of tools, and it too displays the connections between local host and other remote hosts, and the speed at which data is transferring on each connection. Trafshow. Like netwatch and pktstat, trafshow reports the current active connections, their protocol and the data transfer speed on each connection. It can filter out connections using pcap type filters. Monitor only tcp connections$ sudo trafshow - i eth. Netload. The netload command just displays a small report on the current traffic load, and the total number of bytes transferred since the program start. No more features are there. Its part of the netdiag. The output is in a format that is easy to log and parse using other programs or utilities. Cent. OS users need to get it from Repoforge, since its not there in Epel.# ubuntu, debian. Repoforge). $ sudo yum install ifstat. This example shows how to use dstat to report network bandwidth$ dstat - nt. Over here is a simple example of how to use it to report network usage/bandwidth. However these need the user to login to the remote server over ssh. Alternatively web based monitoring tools can also be used for the same task. Ntop and Darkstat are some of the basic web based network monitoring tools available for Linux. Beyond these lie the enterprise level monitoring tools like Nagios that provide a host of features to not just monitor a server but entire infrastructure. Last Updated On : 1.
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