FreeBSD watch network interface usage

If you want to know the current network bandwith usage on a FreeBSD host, this will help you.

systat -ifstat 1

$systat -ifstat 1
                   /0   /1   /2   /3   /4   /5   /6   /7   /8   /9   /10
    Load Average   ||||||

     Interface           Traffic               Peak                Total
           lo0  in      0.000 KB/s          0.000 KB/s          308.224 MB
                out     0.000 KB/s          0.000 KB/s          308.224 MB

          bce1  in      2.850 MB/s          2.850 MB/s          157.746 GB
                out   234.496 KB/s        234.496 KB/s           19.901 GB

          bce0  in     90.057 KB/s         92.109 KB/s            7.688 GB
                out   502.722 KB/s        502.722 KB/s           57.205 GB