linux sar查看网络流量

sar -n DEV 1 10
 -n { keyword [,...] | ALL }
              Report network statistics.
 
IFACE
                     Name of the network interface for which statistics are reported.

              rxpck/s
                     Total number of packets received per second.

              txpck/s
                     Total number of packets transmitted per second.

              rxkB/s
                     Total number of kilobytes received per second.

              txkB/s
                     Total number of kilobytes transmitted per second.

              rxcmp/s
                     Number of compressed packets received per second (for cslip etc.).

              txcmp/s
                     Number of compressed packets transmitted per second.

              rxmcst/s
                     Number of multicast packets received per second.

[oracle@dwhtest ~]$ sar -n DEV 1 10
Linux 2.6.32-220.el6.x86_64 (dwhtest) 	05/21/2014 	_x86_64_	(24 CPU)

03:41:25 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s
03:41:26 PM        lo      3.96      3.96      0.23      0.23      0.00      0.00      0.00
03:41:26 PM       em1      2.97      1.98      0.31      0.27      0.00      0.00      0.00
03:41:26 PM       em2      0.00      0.00      0.00      0.00      0.00      0.00      0.00

03:41:26 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s
03:41:27 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.00
03:41:27 PM       em1      1.04      1.04      0.07      0.49      0.00      0.00      0.00
03:41:27 PM       em2      0.00      0.00      0.00      0.00      0.00      0.00      0.00

03:41:27 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s
03:41:28 PM        lo      5.88      5.88      0.28      0.28      0.00      0.00      0.00
03:41:28 PM       em1      1.96      1.96      0.23      0.52      0.00      0.00      0.00
03:41:28 PM       em2      0.00      0.00      0.00      0.00      0.00      0.00      0.00

03:41:28 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s
03:41:29 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.00
03:41:29 PM       em1      2.00      1.00      0.16      0.47      0.00      0.00      0.00
03:41:29 PM       em2      0.00      0.00      0.00      0.00      0.00      0.00      0.00

03:41:29 PM     IFACE   rxpck/s   txpck/s    rxkB/s    txkB/s   rxcmp/s   txcmp/s  rxmcst/s
03:41:30 PM        lo      0.00      0.00      0.00      0.00      0.00      0.00      0.00
03:41:30 PM       em1      1.98      0.99      0.15      0.46      0.00      0.00      0.00
03:41:30 PM       em2      0.00      0.00      0.00      0.00      0.00      0.00      0.00