• iftop
    • 补充说明
      • 语法
      • 选项
      • 界面说明
      • 实例

    iftop

    一款实时流量监控工具

    补充说明

    iftop命令 是一款实时流量监控工具，监控TCP/IP连接等，缺点就是无报表功能。必须以root身份才能运行。

    语法

    1. iftop(选项)

    选项

    1. iftop: display bandwidth usage on an interface by host
    3. Synopsis: iftop -h | [-npblNBP] [-i interface] [-f filter code]
    4.     [-F net/mask] [-G net6/mask6]
    6.    -h                  display this message
    7.    -n                  don't do hostname lookups
    8.    -N                  don't convert port numbers to services
    9.    -p                  run in promiscuous mode (show traffic between other
    10.                        hosts on the same network segment)
    11.    -b                  don't display a bar graph of traffic
    12.    -B                  Display bandwidth in bytes
    13.    -i interface        listen on named interface
    14.    -f filter code      use filter code to select packets to count
    15.                       (default: none, but only IP packets are counted)
    16.    -F net/mask         show traffic flows in/out of IPv4 network
    17.    -G net6/mask6       show traffic flows in/out of IPv6 network
    18.    -l                  display and count link-local IPv6 traffic (default: off)
    19.    -P                  show ports as well as hosts
    20.    -m limit            sets the upper limit for the bandwidth scale
    21.    -c config file      specifies an alternative configuration file
    22.    -t                  use text interface without ncurses
    24.    Sorting orders:
    25.    -o 2s                Sort by first column (2s traffic average)
    26.    -o 10s               Sort by second column (10s traffic average) [default]
    27.    -o 40s               Sort by third column (40s traffic average)
    28.    -o source            Sort by source address
    29.    -o destination       Sort by destination address
    31.    The following options are only available in combination with -t
    32.    -s num              print one single text output afer num seconds, then quit
    33.    -L num              number of lines to print

    界面说明

    第一行为带宽，这里为1Mbit,不是字节哦.
    连接列表，最后三列分别是2秒，10秒和40秒的平均流量
    => 代表发送
    <= 代表接收
    最后三行表示发送，接收和全部的流量，
    第二列为你运行iftop到目前流量，第三列为高峰值，第四列为平均值。

    实例

    1. iftop           # 默认是监控第一块网卡的流量
    2. iftop -i eth1   # 监控eth1
    3. iftop -n        # 直接显示IP, 不进行DNS反解析
    4. iftop -N        # 直接显示连接埠编号, 不显示服务名称
    5. iftop -F 192.168.1.0/24 or 192.168.1.0/255.255.255.0  # 显示某个网段进出封包流量