vnstat:tldr:9748d

The command "vnstat -l -i ${eth0}" is used to monitor network traffic in Linux.

Here's a breakdown of the command:

• "vnstat" is the name of the command-line utility used for network traffic monitoring.
• "-l" is a flag that specifies the command to run in a continuous loop, continuously updating the network traffic statistics on the screen.
• "-i ${eth0}" is another flag that specifies the network interface to monitor. In this case, "${eth0}" is a placeholder for the network interface name. The "eth0" interface is commonly used for wired Ethernet connections in Linux systems. If your system has a different network interface name, you need to replace "${eth0}" with the appropriate interface name.

So when you execute this command, it will continuously display the network traffic statistics (such as data usage, transfer rates, etc.) for the specified network interface (${eth0}) in the terminal.