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Full Discussion: [solved] Process ssh command in while loop
Top Forums Shell Programming and Scripting [solved] Process ssh command in while loop Post 302769869 by westmoreland on Wednesday 13th of February 2013 06:20:26 PM
Old 02-13-2013
[solved] Process ssh command in while loop
I have a script that reads a file containing a list of server names. It's suppose to loop through the list of names and execute a command on the remote server using ssh. It processes the ssh command for the first server in the list and then exits. Here's the code:

Code:
#!/bin/bash

FILENAME=server_list.txt

cat $FILENAME | while read LINE
do
        echo "$LINE"

        # Run the Users.sh script on the remote server
        ssh root@$LINE '/usr/local/bin/Users.sh > /root/UserAccounts.txt'

done

When I comment out the ssh command the script processes as expected. Does ssh do something when it exits the first time that is maybe stopping the rest of the script from processing? I'd appreciate any suggestions.

---------- Post updated at 05:20 PM ---------- Previous update was at 04:28 PM ----------

I found the answer. Gotta use the -n option in the ssh command

Code:
ssh -n root@$LINE '/usr/local/bin/Users.sh > /root/UserAccounts.txt'

This User Gave Thanks to westmoreland For This Post:
jim mcnamara
 

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LEARN ABOUT LINUX

ssh-argv0

SSH-ARGV0(1)						    BSD General Commands Manual 					      SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.	If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project							 September 7, 2001						    Debian Project
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