Installing and using iftop

The installation commands are as follows:

yum -y install libpcap libpcap-devel ncurses ncurses-devel gcc
cd /root
tar -zxvf iftop-0.17.tar.gz
cd iftop-0.17
make install

Once complete, just execute:

iftop -n -i eth1

Please note that your server may not be running on eth1, you may need to adjust this accordingly.

For quicker use, you could also create an alias to avoid typing the whole command. For example, if your server is running on eth1:

echo "alias iftop='iftop -n -i eth1'" >> /root/.bashrc

You'll then need to exit your SSH session and re-login. Following this, you will be able to use iftop to monitor your network traffic.
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