grep eth /proc/net/dev
  eth0:1989007422 1518990    0    0    0     0          0         0 95897204 1208007    0    0    0     0       0          0
  eth1:       0       0    0    0    0     0          0         0        0       0    0    0    0     0       0          0
  eth2:       0       0    0    0    0     0          0         0        0       0    0    0    0