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Full Discussion: Script for shutting down 48 computers
Operating Systems Linux Fedora Script for shutting down 48 computers Post 302941531 by garydeena on Thursday 16th of April 2015 09:14:24 PM
Old 04-16-2015
I presume you are doing this as root. You allow root to ssh onto all your servers ?

Using rudiC example. Just add & on the end and/or </dev/null

Code:
while read COMP
 do 
     echo " Shutting down  "$COMP
     echo    ssh $COMP init 0  </dev/null  &  
 done < complist

If you are running remote ssh commands on a list of servers, you have to add
</dev/null at the end or it will exit after the first one.
With just </dev/null it will run the command on each server in foreground one after another.

You can also add & to the end and it will execute the command in background on each server and return at once.

Test the script with the echo first and then remove, when you want to use it.
Last edited by Scrutinizer; 04-17-2015 at 01:49 AM.. Reason: CODE tags
 

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LEARN ABOUT MOJAVE

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.

     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_ed25519_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_ed25519_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
								 February 17, 2016							       BSD
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