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eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx
          inet addr:xxx.xxx.xxx.xxx  Bcast:xxx.xxx.xxx.xxx  Mask:255.255.255.0
          inet6 addr: fe80::21a:92ff:fead:d686/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1058235 errors:0 dropped:0 overruns:0 frame:0
          TX packets:781959 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:533816746 (509.0 MiB)  TX bytes:713294744 (680.2 MiB)  <====
          Interrupt:16


watch -n 1 "/sbin/ifconfig eth0 | grep bytes"



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