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Combining multiple commands


 
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# 1  
Old 06-05-2009
Combining multiple commands

Hi Guys,

I am looking to optimze these 5 SSH lines to a single SSH to get my machine to not hang! lol!

Code:
cat hosts.lst | xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} top -b > util/{}.top &' >> r_query_info
cat hosts.lst | xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} uname -r > util/{}.osv &' >> r_query_info
cat hosts.lst | xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} psrinfo -vp > util/{}.core &' >> r_query_info
cat hosts.lst | xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} isainfo -kv > util/{}.cpu &' >> r_query_info
cat hosts.lst | xargs -n1 -t -i echo 'home/util/timeout 6 0 ssh -q {} psrinfo -v > util/{}.speed &' >> r_query_info

where hosts.lst is just a file of 2 hosts, home/util/timeout arg1 arg2 is a timeout script. It basically will stop ssh after 6 minutes or a 0 return code.

I would appreciate if any help could be provided in combining all these hardware status commands.


Thanks,
# 2  
Old 06-05-2009
If you remove the "&" from the end of each command they will all run sequentially rather than in parallel, that may be all you need to do?
# 3  
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?
# 4  
Old 06-06-2009
Put all of those commands in a script and run the script instead.
# 5  
Old 06-08-2009
As per your suggestions, i thought to put it in a script but i am getting some problems.


This is the statement i came up with?

Code:
 ssh -q $HOST 'vmstat -w > util/$1.vmstat 2> $LOG_FILE; uname -rv > util/$1.osv 2> $LOG_FILE; prtconf > util/$1.core 2> $LOG_FIL
E; instfix -i > util/$1.ml 2> $LOG_FILE; lsconf > util/$1.speed 2> $LOG_FILE' &


This creates some problems. Can any1 tell me if this is correct?
# 6  
Old 06-08-2009
Variables are not expanded inside single quotes. Things like $LOG_FILE will expand on the remote server instead, probably to nothing.

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