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Top Forums Shell Programming and Scripting Run a command on multiple hosts Post 302966971 by gandolf989 on Thursday 18th of February 2016 10:20:55 AM
Old 02-18-2016
You might find it easier to write a bash script that does what you want it to do,
scp it to each of the servers, then run that script remotely with the '-C' parameter.
Here is some sample code.

Code:
for line in `cat ${HOME}/hosts.txt`
do
   ssh $line -C "/home/myuser/myscript.sh"
   scp $line:/home/myuser/myscript.log myscript_${line}.log
done

You should use the exec command to redirect all of the output to a log file.
Then you can copy the log file back and look at it after the script finishes
on all of the servers.

Code:
#!/bin/bash
exec >/home/myuser/myscript.log
exec 2>&1
# do some stuff
exec 1>&-
exec 2>&-

You should also look at your .bashrc and .bash_profile scripts on the third
server to see if there is anything weird going on. Finally are you running a
different OS on the third system than the first two. If that OS is older that
might explain why it doesn't work there.
This User Gave Thanks to gandolf989 For This Post:
 

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rdeliver(1)						      General Commands Manual						       rdeliver(1)

NAME
rdeliver - Ruby mail filter script SYNOPSYS
rdeliver <options> [script] DESCRIPTION
This script serves as an example of how you can use the RFilter::DeliveryAgent class to perform mail delivery. You can also use this script as a fully functioning mail filter. This script is a basic mail local delivery agent (DeliveryAgent) that can be used in place of procmail, maildrop, etc. in a user's .forward or .qmail file. The user supplies a delivery script that is written in Ruby, which avoids the limitations of the crippled mini-languages so often used in other DeliveryAgent programs. USAGE
rdeliver is invoked from the command line using: % rdeliver <options> [script] The script argument is optional. If omitted the script will look for a file called .rdeliver in the home directory. Options are: --load-path directory Prepend the given directory to ruby's load path. --log filename Log to the given filename. If no log is specified, no logging occurs. --home directory Specify the home directory. rdeliver will change to this directory before reading and writing any files. The home directory defaults to the value of the HOME or LOGDIR environment variable. DELIVERY SCRIPT
The delivery script runs in the context of a class called Deliver (in contrast, most ruby scripts run in the context of the Object class). So any methods added with def will be added to the Deliver class. A minimal delivery script would be: def main agent.save('inbox') end This code defines a Deliver#main method that saves the mail into an mbox style mailbox. The only API the Deliver script has is the #agent method. This retrieves the RFilter::DeliveryAgent object associated with the current message. Using the API of the RFilter::DeliveryAgent object, you can access and modify the message body and headers, defer or reject the message delivery, and deliver into various mailbox formats. See also RFilter::DeliveryAgent and Deliver. INSTALLATION
Assuming you have the RubyMail mail classes installed, you typically have to put something like this in your .forward file: |"/usr/bin/rdeliver --log /home/you/.rlog" This will call rdeliver for each new message you get, and log to /home/you/.rlog. CATASTROPHIC ERRORS
The rdeliver script is very careful with errors. If there is any problem, it logs the error to the log file you specify. But if you do not specify a log file, or the error occurs before the log file is opened, a record of the error is placed in a file called CATASTROPH- IC_DELIVERY_FAILURE in the home directory. If that fails, the error information is printed to the standard output in the hopes that it will be part of a bounce message. In all cases, the exit code 75 is returned, which tells the MTA to re-try the delivery again. AUTHOR
rdeliver and RFilter support classes were written by Matt Armstrong <matt@lickey.com>. This document was originally an RD format document of rdeliver script. This manual page was converted from it for Debian GNU/Linux system. September 2003 rdeliver(1)
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