lftop.txt

// Install_iftop

Product Name: IFTOP
Homepage: http://www.ex-parrot.com/~pdw/iftop/
Description: ftop does for network usage what top(1) does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question “why is our ADSL link so slow?”.

Pre-Installation Requirements:
# yum install -y ncurses-devel

Step 1: Installing libpcap
# cd /usr/local/src
# wget http://www.tcpdump.org/release/libpcap-1.2.1.tar.gz
# tar -zxvf libpcap-1.2.1.tar.gz
# cd libpcap-1.2.1
# ./configure
# make && make install

Step 2: Installing IFTOP
# cd /usr/local/src
# wget http://www.ex-parrot.com/~pdw/iftop/download/iftop-0.17.tar.gz
# tar -zxvf iftop-0.17.tar.gz
# cd iftop-0.17
# ./configure
# make && make install

Step 3: Making IFTOP root only
# chmod 700 /usr/local/sbin/iftop

Step 4: How to use IFTOP
Start it:
# iftop -i eth0

iftop界面相关说明:
界面上面显示的是类似刻度尺的刻度范围，为显示流量图形的长条作标尺用的。
中间的<= =>这两个左右箭头，表示的是流量的方向。
TX：发送流量
RX：接收流量
TOTAL：总流量
Cumm：运行iftop到目前时间的总流量
peak：流量峰值
rates：分别表示过去 2s 10s 40s 的平均流量

http://www.vpser.net/manage/iftop.html