Tcpflow
 

-hey guys how do i use tcpflow to capture packets from my eth0. and where can i see the packets that was captured?

well check the manpage or support documentation for it's usage but the homepage http://www.circlemud.org/~jelson/software/tcpflow/ says that each flow is saved to a seperate fiel in pcap format. wireshark can read pcap files if you're after an x windows / win32 gui for reading them.