Let’s assume i want to save the captured packets of interface “ enp0s3” to a file name enp0s3-26082018.pcap ~]# tcpdump -w enp0s3-26082018.pcap -i enp0s3Ībove command will generate the output something like below, ~]# tcpdump -w enp0s3-26082018.pcap -i enp0s3 Let’s assume we want to capture 12 packets from the specific interface like “enp0s3”, this can be easily achieved using the options “ -c ~]# Example:2) Capturing specific number number of packet from a specific interface Output would be something like below, tcpdump: verbose output suppressed, use -v or -vv for full protocol decode Let’s assume, i want to capture packets from interface “enp0s3” ~]# tcpdump -i enp0s3 When we run the tcpdump command without any options, it will capture packets on the all interfaces, so to capture the packets from a specific interface use the option ‘ -i‘ followed by the interface name. In this tutorial we will discuss how to capture and analyze packets using different practical examples, Example:1) Capturing packets from a specific interface So to stop or cancel the tcpdump command, type “ ctrl+c”.
When we run the tcpdump command without any options then it will capture packets of all the interfaces. On RPM based Linux OS, tcpdump can be installed using below yum command # yum install tcpdump -y
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