0 0
5.65273 767.912
14.2687 1681.15
19.9011 2309.54

sudo nethogs -d 1 -t

Adding local address: 192.168.0.23
Adding local address: fe80::cb1b:6973:f77f:34
Ethernet link detected
Waiting for first packet to arrive (see sourceforge.net bug 1019381)

Refreshing:
unknown TCP/0/0 0   0

Refreshing:
/usr/lib/firefox/firefox/12576/1000 4.07988 543.749
/opt/google/chrome/chrome/2441/1000 1.57285 224.163
unknown TCP/0/0 0   0

Refreshing:
/usr/lib/firefox/firefox/12576/1000 11.9787 1330.22
/opt/google/chrome/chrome/2441/1000 2.26895 350.36
unknown TCP/0/0 0   0

Refreshing:
/usr/lib/firefox/firefox/12576/1000 17.6111 1958.61
/opt/google/chrome/chrome/2441/1000 2.26895 350.36
unknown TCP/0/0 0   0

sudo nethogs -d 1 -t 2>&1 | sed '1,5d;/Refreshing:/d;s_t_ _g'

unknown TCP/0/0 0 0

/usr/lib/firefox/firefox/12576/1000 4.07988 543.749
/opt/google/chrome/chrome/2441/1000 1.57285 224.163
unknown TCP/0/0 0 0

/usr/lib/firefox/firefox/12576/1000 11.9787 1330.22
/opt/google/chrome/chrome/2441/1000 2.26895 350.36
unknown TCP/0/0 0 0

/usr/lib/firefox/firefox/12576/1000 17.6111 1958.61
/opt/google/chrome/chrome/2441/1000 2.26895 350.36
unknown TCP/0/0 0 0

sudo nethogs -d 1 -t 2>&1 | sed '1,5d;/Refreshing:/d;s_t_ _g' | awk 'BEGIN{sent=0; recv=0;};{if (NF >= 2) sent+=$(NF-1); recv+=$NF;}; END{print sent, recv;};'