Monitoring bandwidth with iftop
A poorly configured or troublesome DNS server can result in a variety of issues that includes the failure of application servers and an overall network slowdown. However, before we dive into the inner workings of DNS, it is important to realize that network slowdowns can be attributed to various causes; and with this in mind, it is often a good idea to refer to a package known as iftop.
As discussed in a previous chapter, you will notice that iftop is similar to the top command, but unlike the top command, you will discover that its purpose is to remain specifically interested in measuring the bandwidth of network connections between the host server and an external reference point (IP address).
To install this package, ...
Get Troubleshooting CentOS now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
