Debugging with iftop

In this section, we're going to look at a member of the top family (which is quite extensive, featuring atop, iotop, htop, and so on), which is specifically geared toward network traffic statistics and debugging.

iftop is both handy and very readable.

Getting ready

For this section, we're going to use centos1 and centos2, connect to both in separate windows.

Make sure that you install iftop on centos2 prior to starting. This comes from the Extra Packages for Enterprise Linux (EPEL) repository, so we have to install that first:

$ sudo yum install -y epel-release
$ sudo yum install -y iftop

Start iftop on centos2:

$ sudo iftop -i eth1

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