Shell Programming and Scripting

Hi,

I need some help to improve the execution time for my script.

Here is the case.
i have one Test1 script on server 'A'.
This script Test1 writes some cmd in file cmds.txt
Now i am running running these cmd which is written in file cmds.txt on more than 5 different servers using ssh. as below

ssh serverB < cmds.txt
ssh serverC < cmds.txt
........
....

Now here is the problem, it takes lot of time tio execute these cmd on different server.
My concern is, Is there any other way by which we can execute these cmd on different servers with less execution time.

use -f, so that ssh will run in background

so all ssh commands will be triggered immediately

Code:

 
ssh -f user@machine < cmds.txt

Thanks for the reply.
however i am not getting the output of the cmds written in the cmds.txt.
eg.
$cat cmds.txt
ls -lrt | tail
hostname
pwd

here is the cmd wothout -f
$ssh serevrA 2>/dev/null <cmds.txt
output is below
-rw-r--r-- 1 asd dsa 381 Jun 21 04:02 sdjfhg.txt
-rw-r--r-- 1 asd dsa 381 Jun 20 04:02 sdfg.txt
mach01
/tmp

with -f option no output.

try like this...

your output will be stored in the /tmp/output file

Code:

$ssh serevrA > /tmp/output 2>/dev/null <cmds.txt

by doing this way my concern still exist, means still it is taking more execution time.
Is there any other way by which we can run some cmds on different server(box) without using ssh or in efficient way.