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Full Discussion: Assistance to connect to servers via ssh once and collect various commands into separate variables
Top Forums UNIX for Beginners Questions & Answers Assistance to connect to servers via ssh once and collect various commands into separate variables Post 303038930 by RudiC on Tuesday 17th of September 2019 09:21:20 AM
Old 09-17-2019
Not sure I understand your questions / problems.
Of course, you can adapt the "command substitution" $(...) to fit your needs - in fact, you are required to do so as I only gave a proof of concept.
And, the read VAR1 VAR2 ... assigns each individual command line's output to its respective individual variable - did you try that? The way you propose can't be used as those variables used it the one single ssh session would be defined on the remote system and not expandable (not even existent) on your local system.
 

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LEARN ABOUT CENTOS

hwloc-assembler-remote

HWLOC-ASSEMBLER-REMOTE(1)					       hwloc						 HWLOC-ASSEMBLER-REMOTE(1)

NAME

       hwloc-assembler-remote - Assemble multiple remote host topologies

SYNOPSIS

       hwloc-assembler-remote [options] output.xml host1 host2 ...

OPTIONS

       --ssh <ssh>
	      Use the given ssh command (and options) to connect to remote hosts.

       --lstopo-path <path>
	      Use  the	given path as the remote lstopo command when gathering remote topologies.  By default, lstopo is taken from the PATH envi-
	      ronment variable.

       --lstopo-opts <opts>
	      Pass the given lstopo options when gathering remote topologies.

       --show Display the resulting topology before exit.

       -f --force
	      Ignore failure to load a remote host topology.

DESCRIPTION

       hwloc-assembler-remote is a frontend to hwloc-assembler.  It takes care of retrieving the remote nodes' topologies before  assembling  them
       with hwloc-assembler.

EXAMPLES

       To assemble three nodes topologies:

	   $ hwloc-assembler-remote output.xml host1 host2 host3

       To assemble the topology of a multi-process MPI job defined as a machinefile:

	   $ hwloc-assembler-remote output.xml `cat machinefile | sort | uniq`

RETURN VALUE

       Upon successful execution, hwloc-assembler-remote returns 0.

       hwloc-assembler-remote will return nonzero if any kind of error occurs, such as (but not limited to) failure to parse the command line.

SEE ALSO

       hwloc(7), lstopo(1), hwloc-assembler(1)

1.7								   Apr 07, 2013 					 HWLOC-ASSEMBLER-REMOTE(1)
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