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Run a shell script on all 15 servers at the same time?

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Top Forums Shell Programming and Scripting Run a shell script on all 15 servers at the same time?
# 8  
Old 09-10-2015
Do you mean avoiding the SSH passphrase when you open the connection? You would need to create a key-pair that does not have one. You then have to carefully consider if anything or anyone else could get at the private key, because without a passphrase, it could be used more easily.

Can you secure the account that will be performing this work?


Robin
This User Gave Thanks to rbatte1 For This Post:
vkiyv05
# 9  
Old 09-10-2015
Quote:
Originally Posted by laknar
Code:
textfile="/home/laknar/hostfile"

while read r
do
    ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no laknar@$r 'myscript.ksh &'

done < $textfile

is this correct?
You should prevent ssh from reading the while loop's input.
Either by redirecting ssh's stdin
Code:
  < /dev/null ssh ...

or by a -n option
Code:
  ssh -n ...

If the backgrounding works, it is safer to add a little sleep to the loop
Code:
while ...
do
   command &
   sleep 1
done

# 10  
Old 09-10-2015
After enter passphrase , i am able to do ssha directly to the host but not from the script..
# 11  
Old 09-10-2015
Hi.

For the parallel connection to numerous servers, we use:
Code:
pdsh - Efficient rsh-like utility, for using hosts in parallel

with the ssh (not rsh) option after the keys have been distributed to the servers.

There may be other even better solutions, but pdsh has worked well for us. It seems to be on most Linux variants.

Best wishes ... cheers, drl
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