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Full Discussion: Combining multiple commands
Top Forums Shell Programming and Scripting Combining multiple commands Post 302323217 by Corona688 on Friday 5th of June 2009 07:04:17 PM
Old 06-05-2009
Quote:
Originally Posted by wick3dsunny
Hi Guys,

I am looking to optimze these 5 SSH lines to a single SSH to get my machine to not hang! lol!
First off, you get a [url=http://partmaps.org/era/unix/award.html]UUOC Award[/url= Smilie

Code:
cat hosts.lst | xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} top -b > util/{}.top &' >> r_query_info

is better as

Code:
xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} top -b > util/{}.top &' >> r_query_info < hosts.lst

To combine them... hm... I'm not quite sure what it's all doing. Is it creating files locally, remotely, or both?
 

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PARALLEL-SLURP(1)														 PARALLEL-SLURP(1)

NAME
parallel-slurp - copy files from listed hosts SYNOPSIS
parallel-slurp [OPTIONS] -h hosts.txt -L destdir remote local DESCRIPTION
pssh provides a number of commands for executing against a group of computers, using SSH. It's most useful for operating on clusters of homogenously-configured hosts. parallel-slurp gathers specified files from hosts you listed. OPTIONS
-r --recursive recusively copy directories (OPTIONAL) -L --localdir output directory for remote file copies -h --hosts hosts file (each line "host[:port] [user]") -l --user username (OPTIONAL) -p --par max number of parallel threads (OPTIONAL) -o --outdir output directory for stdout files (OPTIONAL) -e --errdir output directory for stderr files (OPTIONAL) -t --timeout timeout (secs) (-1 = no timeout) per host (OPTIONAL) -O --options SSH options (OPTIONAL) -v --verbose turn on warning and diagnostic messages (OPTIONAL) EXAMPLE
An example to copy /home/irb2/foo.txt from each host. Files gathered will be stored in /tmp/outdir/hostname/foo.txt. # prallel-slurp -h hosts.txt -L /tmp/outdir -l irb2 /home/irb2/foo.txt foo.txt ENVIRONMENT
All four programs take similar sets of options. All of these options can be set using the following environment variables: o PSSH_HOSTS o PSSH_USER o PSSH_PAR o PSSH_OUTDIR o PSSH_VERBOSE o PSSH_OPTIONS SEE ALSO
parallel-ssh(1), parallel-scp(1), parallel-nuke(1), parallel-rsync(1), ssh(1) AUTHOR
Brent N. Chun <bnc@theether.org> COPYING
Copyright: 2003, 2004, 2005, 2006, 2007 Brent N. Chun NOTES
1. bnc@theether.org mailto:bnc@theether.org 03/30/2009 PARALLEL-SLURP(1)
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