![]() ![]() -m: Change the units that are displayed for used network bandwidth.While nethogs is running you can use the following interactive commands: For instance, to collect data from eth0 and eth1 ports: sudo nethogs -d 5 eth0 eth1 Nethogs can also be used to monitor multiple network ports at once. To add a refresh rate of five seconds and device name to monitor the eno1 device bandwidth use the command: sudo nethogs -d 5 eno1 For example, to refresh the display every five seconds: sudo nethogs -d 5 Use the -d flag to instruct nethogs to use a refresh rate. In the example below, nethogs reports an Ubuntu Linux workstation copying a Server Message Block (SMB) file from a Samba server, the Chrome web browser, a background Slack messaging client, and an idle Evolution e-mail client. Nethogs defaults to constantly measuring traffic to and from the eth0 port when the utility is run without any options: sudo nethogs The nethogs Linux networking system monitoring program’s syntax is as follows: nethogs But it also can be used in shell programs, or as a graphical program with the nethogs-qt Qt-based GUI. Nethogs is commonly run as an interactive program. Install nethogs: sudo apt-get install nethogs However, if that is not the case, this section shows you how to install nethogs on a Debian or Ubuntu distribution. Many Linux distributions come with nethogs already installed. You may also wish to set the timezone, configure your hostname, create a limited user account, and harden SSH access. See our Getting Started with Linode and Creating a Compute Instance guides.įollow our Setting Up and Securing a Compute Instance guide to update your system. If you have not already done so, create a Linode account and Compute Instance. If you are using a Linode, make sure you run the steps in this section to configure your Linode, secure your server, and update your system’s packages. As long as you have the program running in the foreground, the nethogs display is constantly updated. Nethogs then displays the data as a text-based chart, using ncurses. It picks up this data by using both proc data and libpcap for user-level packet capture. When the Linux networking monitoring tool is started, nethogs displays current networking data. This makes it easy to identify which programs may be misbehaving, because you can see the programs that are using more than their fair share of available bandwidth. Using the collected data, nethogs displays both process IDs ( PID) and the program’s name. It works on any Linux system, but it doesn’t work well on other related server operating systems such as FreeBSD. It does not rely on a special kernel module or driver. Nethogs gathers its data from the files within the /proc/net directories. But nethogs makes it easier for Linux administrators to identify which process is generating the usage spikes. For example, net top may show that outbound traffic increased on a Linux server by protocol or subnet. It extends the net top tool to track bandwidth by process. ![]() Nethogs is a free, open-source program used to track network usage. ![]()
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