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# vnStat

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vnStat is a lightweight (command line) network traffic monitor. It monitors selectable interfaces and stores network traffic logs in a database for later analysis.

## Installation

Install the vnstat package.

## Configuration

Start/enable the `vnstat.service` daemon.

Pick a preferred network interface and edit the `Interface` variable in the `/etc/vnstat.conf` accordingly. To list all interfaces available to vnstat, use `vnstat --iflist`.

To start monitoring a particular interface that was not referred to in the configuration file when the daemon was started, you must initialize a database first. Each interface needs its own database. The command to initialize one for the `eth0` interface is:

    # vnstat --add -i eth0

Remember to restart the `vnstat.service` daemon after you have added a new interface.

## Usage

Query the network traffic:

    # vnstat --query

Viewing live network traffic usage:

    # vnstat --live

To find more options, use:

    # vnstat --help

or to see all options use:

    # vnstat --longhelp

Eye candy presentation of the data can also be achieved by vnstati(1), which is part of the vnstat package.

Categories:

- Networking
- Network monitoring