Monitoring live bandwidth on Ubuntu with tcptrack

I had the need to view the live outgoing bandwidth and connection stats on a web server recently to investigate a performance bottleneck, and I found tcptrack which allows you to do just that.

To install tcptrack, execute the following command:

sudo apt-get install tcptrack

You can then view live bandwidth and connections by executing the following command:

root@server:~# tcptrack -i eth0

Client                Server                State        Idle A Speed
85.x.x.x:61840        149.x.x.x:22        ESTABLISHED      0s     10 KB/s
149.x.x.x:43574       95.x.x.x:80         SYN_SENT         0s     0 B/s
149.x.x.x:53540       95.x.x.x:443        SYN_SENT         0s     0 B/s
172.x.x.x:12142       149.x.x.x:80        CLOSED           1s     0 B/s
149.x.x.x:35366       104.x.x.x:443       ESTABLISHED      2s     0 B/s
172.x.x.x:63306       149.x.x.x:80        ESTABLISHED      2s     0 B/s
172.x.x.x:64676       149.x.x.x:80        ESTABLISHED      4s     0 B/s
172.x.x.x:28720       149.x.x.x:80        ESTABLISHED      9s     0 B/s
172.x.x.x:34900       149.x.x.x:80        ESTABLISHED      12s    0 B/s
172.x.x.x:29632       149.x.x.x:80        ESTABLISHED      13s    0 B/s
172.x.x.x:22742       149.x.x.x:80        ESTABLISHED      13s    0 B/s

Replace eth0 with your interface name if required (run ifconfig to list all interfaces).

It also provides you with additional sort options: Sorted by rate or Sorted by bytes.