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Full Discussion: Tcpdump on many machines from single script
Top Forums Shell Programming and Scripting Tcpdump on many machines from single script Post 303023990 by k9sar on Wednesday 26th of September 2018 07:13:24 PM
Old 09-26-2018
Tcpdump on many machines from single script
Hi all, new to the forum and rusty with my scripting. I am trying to put together a quick and dirty script that will kickoff a tcpdump on multiple machines. Then, another script that will reach out (at a later time) to stop the processes and retrieve the data. It seems fairly easy conceptually and will most likely consist of repeating lines with different username@<ip addresses> so I am trying to get just one to work for now.
Digging around the interweb has simply confused me and I could really use some help.

The usernames for the machines all have passwords (sorry, using keys is not an option) so I was looking at using expect like:

Code:
#!/usr/bin/expect -f
spawn ssh <username>@<ip_address> "/usr/sbin/tcpdump -i any -w filename.dump &"
expect "assword:"
send "<password>\r"

... then repeat for another server, leaving tcpdump running on each box when I'm done

Obviously, this does not work or I wouldn't be here. In this case, the script runs but when I look on the server, tcpdump is not running. I had tried using "interact" after the password and removing the & but that just left my script hanging and not moving on to kickoff the next tcpdump.

Any suggestions/corrections would be appreciated
 

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LEARN ABOUT CENTOS

bel

BEL(1)																	    BEL(1)

NAME

       bel - open a shell or execute a command on a remote computer through several machines

SYNOPSIS

       bel [-e file] [-s file] [-d delay]

DESCRIPTION

       bel generates a script allowing the user to open a shell or execute a command on a remote computer through several machines. In order to
       generate the script, the user gives the paths to the different machines until the final one is reached. Several paths may be specified in a
       single entry file or through the standard input.

OPTIONS

       -e, --entree=FILE
	   Provide the necessary information to establish the tunnel between the source and the final computer.

       -s, --repertoire-sortie=DIRECTORY
	   The directory where you want to put the generated scripts.

       -d, --delai=SECONDS
	   Delay to wait before each sent command, in seconds.

AUTHOR

       Carl Chenet <chaica@ohmytux.com[]>

RESSOURCES

       Belier homepage : http://www.ohmytux.com/belier

LICENSE

       Copyright (C) <2009> <Carl Chenet>This program is free software: you can redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation, either version 3 of the License or any later version. This program is
       distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
       FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public
       License along with this program. If not, see <http://www.gnu.org/licenses/>.

								    05/16/2009								    BEL(1)
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