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This example code is intended to be used as a root permissions check in a script. It makes use of the $EUID (effective user ID) environment variable which is fully su- and sudo-safe.
dsniff is general purpose password sniffer, it handles *lots* of different protocols, but it also handles tcp-style expressions for limiting analyzed traffic - so I can limit it to work on pop3 only.
The command is useful for monitoring the use of the boxes and their connection IP.
Result file "sniff" is readable with GUI program "wireshark" or through CLI with the command:
tcpdump -f "sniff" -XX