Installing iftop

Using the iftop we can monitor the server network traffic and find out which is slowing down your server.

1. cd /usr/local/src/
2. wget http://www.ex-parrot.com/~pdw/iftop/download/iftop-0.17.tar.gz

3. tar zxf  iftop-0.17.tar.gz

4.  cd iftop-0.17

5. ./configure

6. make

7. make install

Commands:

iftop -i etho

iftop -i eth0:cp2

S -> display source port
D -> display destination port

Error while installing iftop.

ISSUE :1.

./configure

checking for library containing gethostbyaddr_r... none required

checking how to call gethostbyaddr_r... 8 args, int return

checking gethostbyaddr_r usability... yes

checking where to find pcap.h... no idea

configure: error: can't find pcap.h

You're not going to get very far without libpcap.

Fix :

yum install libpcap-devel