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Mastering Linux Network Administration

You're reading from   Mastering Linux Network Administration Master the skills and techniques that are required to design, deploy, and administer real Linux-based networks

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Product type Paperback
Published in Nov 2015
Publisher Packt
ISBN-13 9781784399597
Length 260 pages
Edition 1st Edition
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Author (1):
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Jay LaCroix Jay LaCroix
Author Profile Icon Jay LaCroix
Jay LaCroix
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Table of Contents (12) Chapters Close

Preface 1. Setting up Your Environment FREE CHAPTER 2. Revisiting Linux Network Basics 3. Communicating Between Nodes via SSH 4. Setting up a File Server 5. Monitoring System Resources 6. Configuring Network Services 7. Hosting HTTP Content via Apache 8. Understanding Advanced Networking Concepts 9. Securing Your Network 10. Troubleshooting Network Issues Index

Displaying connection statistics with netstat


The netstat command is a useful utility to allow you to view some statistics regarding your current connection. We touched on it a bit in the last chapter. This command allows you to show useful networking information, such as showing you services that are listening for connections on your network card, and printing your routing table, among other things.

In the last chapter, I gave the example of netstat -tulpn to allow you to view currently connected and listening services. This command shows everything that's listening, as well as the port that it's listening on. Breaking this command down, we passed along some parameters. The first, -t, identifies that we would like to view information pertaining to TCP, -u represents UDP, -l requests listening sockets, -p attempts to show the name of the program, and -n also shows numeric values. Putting it all together, we get netstat -tulpn. In the industry, this is the most common usage of netstat that...

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