實時檢查傳入的網路流量？

有沒有辦法可以在我的伺服器上實時監控傳入的網路流量？最好以 *bps 表示

執行 Ubuntu

如果統計：

rilindo@ubuntu:~$ sudo apt-get install ifstat
[sudo] password for rilindo: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
 ifstat
0 upgraded, 1 newly installed, 0 to remove and 3 not upgraded.
Need to get 23.4kB of archives.
After this operation, 94.2kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu/ lucid/universe ifstat 1.1-8 [23.4kB]
Fetched 23.4kB in 0s (34.6kB/s) 
Selecting previously deselected package ifstat.
(Reading database ... 92838 files and directories currently installed.)
Unpacking ifstat (from .../ifstat_1.1-8_amd64.deb) ...
Processing triggers for man-db ...
Setting up ifstat (1.1-8) ...
rilindo@ubuntu:~$ ifstat
      eth0                br0                virbr0              vnet0               vnet1               vnet2               vnet3               vnet4       
KB/s in  KB/s out   KB/s in  KB/s out   KB/s in  KB/s out   KB/s in  KB/s out   KB/s in  KB/s out   KB/s in  KB/s out   KB/s in  KB/s out   KB/s in  KB/s out
   4.67      5.21      3.67      5.05      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
   3.93      4.59      0.38      0.74      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
   3.93      4.59      6.19      8.30      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
   3.93      4.59      3.03      4.33      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00

引用自：https://serverfault.com/questions/337604