Testing the Network Speed: The netcat way

Testing your core network speed is essential to describe possible bottlenecks.

Here is practical way to do this;

nc is a golden linux tool which stands for netcat.
On the receiver side;
# nc -l -p6666 > /dev/null is the listened IP address.

On the transmitter side;
# dd if=/dev/zero bs=1024k count=1024 | nc 6666

At the end of pumping of the zeros "dd" shows total used time and bw/s values.
If not, you can use the "time" command before the dd to do this.