a network protocol analyzer (or "packet sniffer") that can be used for
network analysis, troubleshooting, software development, education,
etc. This guide shows how to install and use it on an Ubuntu 9.10
desktop to analyze the traffic on the local network card.
Occasionally, I'll need to compare packet captures (usually wireshark or tcpdump) that are collected from both sides of a TCP conversation. Sometimes the two hosts involved are very "chatty" so I'll need to narrow down the capture to just a specific session.