07-26-2013
please give me an example using expect and capturing the output of particular command in a file.
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How can I redirect the output of a following command to a variable.
ftp myservername
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(username) guptaji
331 Password required for guptaji.
Password:
ftp> size /home/salil/abc.dat
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?Invalid command
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LEARN ABOUT DEBIAN
pcapdump
pcapdump(1) pcapdump(1)
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 formated 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; de-
faults will be used otherwise). See /usr/share/doc/pcaputils/examples/pcapdump/eth0 for an example.
9 May 2009 pcapdump(1)