tcpdump 3.9.7-1 (powerpc binary) in ubuntu gutsy

 This program allows you to dump the traffic on a network. tcpdump
 is able to examine IPv4, ICMPv4, IPv6, ICMPv6, UDP, TCP, SNMP, AFS
 BGP, RIP, PIM, DVMRP, IGMP, SMB, OSPF, NFS and many other packet
 types.
 .
 It can be used to print out the headers of packets on a network
 interface, filter packets that match a certain expression. You can
 use this tool to track down network problems, to detect "ping attacks"
 or to monitor network activities.
 .
 Further information is available at <URL: http://www.tcpdump.org/>