How to test the network speed/throughput between two Linux servers

There are several tools you can use to test the network speed or throughput between two Linux servers. Some of the most commonly used tools are iperf, netcat, and dd.

1. iperf:

iperf is a widely used tool for measuring network performance and throughput. It allows you to test the bandwidth and performance of a network connection between two servers.

To use iperf, you need to install it on both servers. On most Linux distributions, you can install iperf using the package manager. For example, on Ubuntu or Debian, you can use the following command:

apt-get install iperf

Once iperf is installed on both servers, you can use the following command to start the iperf server on one of the servers:

iperf -s

Then, on the other server, you can use the following command to connect to the iperf server and measure the network throughput:

iperf -c <server_ip>

Replace <server_ip> with the IP address of the server running the iperf server.

2. netcat:

netcat (also known as nc) is a simple tool for reading and writing data across networks. It can be used to measure the network throughput between two servers.

To use netcat, you need to install it on both servers. On most Linux distributions, you can install netcat using the package manager. For example, on Ubuntu or Debian, you can use the following command:

apt-get install netcat

Once netcat is installed on both servers, you can use the following command to start the netcat server on one of the servers:

nc -l <port> > /dev/null

Replace <port> with the port number you want to use.

Then, on the other server, you can use the following command to connect to the netcat server and measure the network throughput:

dd if=/dev/zero bs=1M count=1024 | nc <server_ip> <port>

Replace <server_ip> with the IP address of the server running the netcat server, and <port> with the port number you specified in the previous command.

3. dd:

dd is a simple command-line tool for copying and converting files. It can be used to measure the network throughput between two servers by copying a large file from one server to the other.

To use dd, you need to install it on both servers. On most Linux distributions, dd is installed by default.

Once dd is installed on both servers, you can use the following command to copy a large file from one server to the other and measure the network throughput:

dd if=