Linux Administration: The Linux Operating System and Command Line Guide for Linux Administrators by Jason Cannon

Author:Jason Cannon
Language: eng
Format: mobi, azw3, epub, pdf
Published: 2016-02-04T22:00:00+00:00

Packet Sniffing

Sometimes it's not enough to know that network connectivity is in place. Sometimes you need to examine the contents of the network traffic to ensure payloads are actually being delivered. Perhaps one host is claiming to send data to another; to be sure that data is reaching its destination, you can look at the traffic it is receiving. To do this, you'll want to use some sort of packet sniffing tool, such as tcpdump.

Even though there are several other tools that perform this same task, tcpdump is one of the older and most commonly installed tools. It requires root privileges to run. If you run it without arguments, it prints out a description of the contents of network packets being received.

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