最近需要查看下Linux的端口和网络连接状态,找了一些工具尝试了下,发现iftop比较好用,这里简单的笔记下使用方法。
CONTENTS
首先看下iftop的帮助命令
cstriker1407@cstriker1407-x64:~$ sudo iftop -h 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 #显示当前信息 -n don't do hostname lookups #不进行hostname反向查询,如果指定了,IP不会显示为已经解析的hostname -N don't convert port numbers to services #不进行端口反向查询,如果指定了,端口不会显示为指定的名称 -p run in promiscuous mode (show traffic between other hosts on the same network segment) -b don't display a bar graph of traffic #不显示流量柱状图 -B Display bandwidth in bytes -i interface listen on named interface #指定监听网卡 -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 #显示端口 -m limit sets the upper limit for the bandwidth scale -c config file specifies an alternative configuration file -t use text interface without ncurses #使用正常的text输出模式,不使用ncurses方式,即每次都会刷新console 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 iftop, version 1.0pre4 copyright (c) 2002 Paul Warren <pdw@ex-parrot.com> and contributors
这里笔记几个常用的命令
直接最简单方式查看
cstriker1407@cstriker1407-x64:~$ sudo iftop -i wlan0 #此时会使用ncurses方式进行交互式查询
cstriker1407@cstriker1407-x64:~$ sudo iftop -i wlan0 -nNPt #当需要明确的网络使用情况时,作者比较喜欢这种方式:text方式,显示端口和IP,而且不进行反向查询。
CentOS如何安装iftop
yum install epel-release yum install iftop
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