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Nload is an easy-to-use and powerful tool. It is only relatively simple, and you can only view the total traffic. Unlike iptraf, you can monitor the traffic of the network card in real time, such as IP and protocol, which is divided into two parts: Incoming,Outgoing, that is, inflow and outflow.

System environment

Centos7

Installation

You can easily install nload tools by installing the epel software source first on CentOS/RHEL-based systems.

[root@localhost ~] # wget-O / etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo[root@localhost ~] # yum makecache [root@localhost ~] # yum-y install nload how to use nload to monitor network traffic

After starting nload, you can switch between network cards by pressing the left and right arrow keys (you can specify the device on the command line, or you can automatically detect the device):

[root@localhost ~] # nload

You can specify the Nic name on the command line

[root@localhost ~] # nload ens38

After running nload, you can use the following keyboard shortcuts:

Use the left and right arrow keys or the Enter / Tab key to switch the display to the next network card. Use F2 to display the options window. Use F5 to save the current settings to the user profile. Use F6 to reload settings from the configuration file. Use Q or Ctrl + C to exit nload.

Display more than one device at a time, instead of displaying the flow graph, you can use the-m option. The arrow keys toggle the number of devices displayed on the screen back and forth:

[root@localhost] # nload-m

Use the-an option to set the length of the calculation time window in seconds.

[root@localhost] # nload-a 400

The-t interval option sets the refresh interval (in milliseconds, default is 500) for the display. Note that specifying a refresh interval of less than about 100 milliseconds makes the traffic calculation inaccurate:

[root@localhost] # nload-ma 400-t 600

To learn more about the options, use the nload-- help command.

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