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Network Traffic Analysis with tcpdump (Debian/Ubuntu) Introduction tcpdump is a lightweight, command-line packet capture tool for analyzing network traffic on Linux systems. It’s ideal for server environments or quick diagnostics without a GUI, complementing tools like Wireshark. This guide covers installing tcpdump on Debian/Ubuntu, capturing traffic on a network interface, applying filters, saving captures to PCAP files, and analyzing them with tcpdump or Wireshark. It includes examples for monitoring HTTP traffic, debugging connectivity, and remote capturing. ...