![]() It is usually easier to work if you use IP addresses instead of names, such as kkulkarni.53013 as shown in the above output. Tcpdump: verbose output suppressed, use -v or -vv for full protocol decode However, if there is no activity on the interface, tcpdump keeps waiting. So when you want to capture only a small sample set of packets, you can use this option. ![]() Otherwise, tcpdump will keep running indefinitely. The -c option captures X number of packets and then stops. It also tells you if the interface is Up, Running, and whether it is a Loopback interface, as you can see below: # tcpdump -DĤ.any (Pseudo-device that captures on all interfaces) Once you see this list, you can decide which interface you want to capture the traffic on. This option identifies what devices tcpdump knows about. Tcpdump with -D provides a list of devices from which you can capture traffic. ![]() ![]() Part one begins with some basic tricks to gather information about the interfaces and to start captures.
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