Linux iftop命令怎么使用

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Linux常用命令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。

iftop

一款实时流量监控工具

语法

 iftop(选项)

选项

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

 iftop           # 默认是监控第一块网卡的流量 iftop -i eth2   # 监控eth2 iftop -n        # 直接显示IP, 不进行DNS反解析 iftop -N        # 直接显示连接埠编号, 不显示服务名称 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

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