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Full Discussion: Passing file name to get uptimes
Top Forums Shell Programming and Scripting Passing file name to get uptimes Post 302607820 by Corona688 on Thursday 15th of March 2012 11:40:37 AM
Old 03-15-2012
Quote:
Originally Posted by hithere30052
Thanks Corona...can you also help me here

the updates you made to the script displays only one row and i wanted all 50 servers to be displayed.
My changes are not working either:

Code:
server_list='/tmp/hosts.list'

for SERVER in $server_list
do
    while read line
    do
    /usr/local/bin/ssh "$SERVER" printf "${server} : " ';' uptime
    done < $server_list
done

Errors i am getting:
Code:
ssh: /tmp/hosts.list: no address associated with name
ssh: /tmp/hosts.list: no address associated with name
ssh: /tmp/hosts.list: no address associated with name
.....

My suggestion was not a skeleton or pseudocode, I expected it to work as-is and you didn't need to modify it to add extra loops. It already had a loop which read servers from your server file one by one and fed them into ssh individually. Did you try my original, unmodified code?

$server_list is a file, therefore, 'for x in $server_list' makes no sense. You read from files.
Code:
server_list='/tmp/hosts.list'

while read SERVER
do
    /usr/local/bin/ssh "$SERVER" printf "${SERVER} : " ';' uptime
done < $server_list

 

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LEARN ABOUT LINUX

ssh-keysign

SSH-KEYSIGN(8)						    BSD System Manager's Manual 					    SSH-KEYSIGN(8)

NAME

     ssh-keysign -- ssh helper program for host-based authentication

SYNOPSIS

     ssh-keysign

DESCRIPTION

     ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication with
     SSH protocol version 2.

     ssh-keysign is disabled by default and can only be enabled in the global client configuration file /etc/ssh/ssh_config by setting
     EnableSSHKeysign to ``yes''.

     ssh-keysign is not intended to be invoked by the user, but from ssh(1).  See ssh(1) and sshd(8) for more information about host-based authen-
     tication.

FILES

     /etc/ssh/ssh_config
	     Controls whether ssh-keysign is enabled.

     /etc/ssh/ssh_host_dsa_key
     /etc/ssh/ssh_host_ecdsa_key
     /etc/ssh/ssh_host_rsa_key
	     These files contain the private parts of the host keys used to generate the digital signature.  They should be owned by root, read-
	     able only by root, and not accessible to others.  Since they are readable only by root, ssh-keysign must be set-uid root if host-
	     based authentication is used.

     /etc/ssh/ssh_host_dsa_key-cert.pub
     /etc/ssh/ssh_host_ecdsa_key-cert.pub
     /etc/ssh/ssh_host_rsa_key-cert.pub
	     If these files exist they are assumed to contain public certificate information corresponding with the private keys above.

SEE ALSO

     ssh(1), ssh-keygen(1), ssh_config(5), sshd(8)

HISTORY

     ssh-keysign first appeared in OpenBSD 3.2.

AUTHORS

     Markus Friedl <markus@openbsd.org>

BSD
								  August 31, 2010							       BSD
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