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Could you tell me how I can start to capture packets with specific interface by command line and saving it by command line using Wireshark? I would like to save it on my Desktop.

OS X 10.9.2

Wireshark 1.10.5

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The tshark utility is included with wireshark for this purpose.

tshark -i en1 -w ~/Desktop/packet_capture_file.cap

You can also start tcpdump from a command line, and then open the resulting .pcap file in Wireshark's GUI

sudo tcpdump -i en1 -s 0 -B 524288 -w ~/Desktop/packet_capture_file.pcap

Both of those commands will start a capture of the interface en1 and write the output to packet_capture_file.pcap on your desktop.

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