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Full Discussion: Need help to create a script...
Top Forums Shell Programming and Scripting Need help to create a script... Post 302343023 by avronius on Tuesday 11th of August 2009 10:26:55 AM
Old 08-11-2009
Did you try ssh?

If you wish to run commands against multiple hosts, create a file that lists each of your hosts (one per line). In the script example below, I've used "hostfile".

I've decided to connect to each host via ssh and run a couple of commands. In order to do so, they are passed to the ssh command INSIDE quotation marks. There are many limitations to this - you are welcome to experiment.

Start by running something simple:
Code:
for host in `cat hostfile`; do ssh $host "uname -n; touch /tmp/file.`date +%d%m%y`"; done;

Then test it by running:
Code:
for host in `cat hostfile`; do echo $host; ssh $host ls -trail /tmp; done

Expand and test where you can. The command `date +%d%m%y` is getting the date from the host where you are running the script - not from the host that you are ssh'ing in to.

Good luck...
 

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LEARN ABOUT CENTOS

service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script,  service  passes  COMMAND and OPTIONS it to the init script unmodified.  All scripts should support at least the start and
       stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the  start
       command.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

       If the init script file does not exist, the script tries to use legacy actions.	If there is no suitable legacy action found and COMMAND is
       one of actions specified in LSB Core Specification, input is redirected to the systemctl.  Otherwise the command fails with return code 2.

FILES

       /etc/init.d
	      The directory containing System V init scripts.

ENVIRONMENT

       LANG, TERM
	      The only environment variables passed to the init scripts.

SEE ALSO

       chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5)

								     Jan 2006								service(8)
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