Linux命令 iftop - 一款實(shí)時(shí)流量監(jiān)控工具

iftop

一款實(shí)時(shí)流量監(jiān)控工具

補(bǔ)充說明

iftop命令 是一款實(shí)時(shí)流量監(jiān)控工具，監(jiān)控TCP/IP連接等，缺點(diǎn)就是無報(bào)表功能。必須以root身份才能運(yùn)行。

語法

iftop(選項(xiàng))

選項(xiàng)

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

界面說明

第一行為帶寬，這里為1Mbit,不是字節(jié)哦. 連接列表，最后三列分別是2秒，10秒和40秒的平均流量 => 代表發(fā)送<= 代表接收 最后三行表示發(fā)送，接收和全部的流量， 第二列為你運(yùn)行iftop到目前流量，第三列為高峰值，第四列為平均值。

實(shí)例

iftop           # 默認(rèn)是監(jiān)控第一塊網(wǎng)卡的流量
iftop -i eth1   # 監(jiān)控eth1
iftop -n        # 直接顯示IP, 不進(jìn)行DNS反解析
iftop -N        # 直接顯示連接埠編號(hào), 不顯示服務(wù)名稱
iftop -F 192.168.1.0/24 or 192.168.1.0/255.255.255.0  # 顯示某個(gè)網(wǎng)段進(jìn)出封包流量