NAME

       pcapdump - dedicated packet capture utility

SYNOPSIS

       pcapdump [OPTIONS]...

DESCRIPTION

       pcapdump  captures  packets  from  a  network interface and writes them to a dumpfile. The
       filename argument given to -w will be formatted by strftime(3).

PCAPNET OPTIONS

       -i interface
              Input interface to read packets from.

       -r pcap file
              Dump file to read packets from.

       -w pcap file
              Dump file to write filtered packets to.

       -f expression
              BPF expression which selects packets to be filtered.

       -s snaplen
              Capture snaplen bytes of data from each packet.

       -p     Disable promiscuous mode sniffing.

PROGRAM OPTIONS

       -u owner
              Set the output file's owning user to owner.

       -g group
              Set the output file's owning group to group.

       -m mode
              Set the output file's mode to mode, specified in octal.

       -t secs
              Dump file rotation interval in seconds.

       -c count
              Exit after capturing count packets.

       -T secs
              Exit after capturing during this amount of seconds.

       -H     Only capture link, network, and transport headers; do not capture application-layer
              data.

       -S sample value
              Sample the packet stream by only dumping 1 in every sample value packets.

       -R     Together with -S, sample the packets randomly, not systematically.

       -P pidfile
              Daemonize the process and write its PID to pidfile.

       -C config file
              File to read configuration variables from. Instead of passing configuration through
              the command line, a file can be  used  to  specify  values  for  the  bpf,  device,
              filefmt,  group,  interval, mode, owner, promisc, and snaplen options (not all need
              to    be    specified;    defaults     will     be     used     otherwise).     See
              /usr/share/doc/pcaputils/examples/pcapdump/eth0 for an example.

                                         29 October 2024                              pcapdump(1)