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ipsumdump:tldr:f18f5
The command "ipsumdump --interface ${eth0} -tsSdDp" is used to analyze network traffic on the specified network interface.
Here is a breakdown of the command:
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"ipsumdump": This is the name of the command itself. It is a utility that is used for analyzing network traffic.
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"--interface ${eth0}": This option specifies the network interface to capture traffic from. In this case, the variable "${eth0}" is being used, which likely represents the first Ethernet interface on the system.
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"-tsSdDp": These are a series of command-line options that modify the behavior of the "ipsumdump" command. Here's what each option does:
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"-t": This option adds a timestamp to each packet logged.
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"-s": This option displays a summary of captured traffic, including the number of packets and bytes captured.
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"-S": This option displays a summary with statistics for each TCP stream.
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"-d": This option decodes the contents of each packet, displaying the protocol-specific information.
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"-D": This option also decodes the data portion of each packet, providing more detailed information about the contents.
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"-p": This option displays payload information for each captured packet, which includes the actual data being transmitted.
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So, in summary, the command "ipsumdump --interface ${eth0} -tsSdDp" captures network traffic on the specified Ethernet interface (${eth0}), adds timestamps, provides a summary of captured traffic and statistics for TCP streams, decodes packet information including protocols, and displays payload data for each captured packet.