Penguin
Annotated edit history of TcpDump version 2, including all changes. View license author blame.
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1 CraigBox 1 [tcpdump|http://www.tcpdump.org/] is a program that performs capture of packet information for [IP] packets. It originally supported only [TCP] packets, but has since grown to decode all manner of protocols, including [UDP] and [ICMP].
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3 Hints
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5 * Capture information to file with -w as on slower hosts you will drop information if you capture and display at same time. When you capture you also get to look at again (and again and again).
6 * Use -s0, as the default capture length does not capture enough information for many Protocol~s.
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8 See also:
9 * tcpdump(8)
2 LawrenceDoliveiro 10 * [Wireshark] (née [Ethereal]), a graphical package capture program that can interpret tcpdump streams