to scp to multiple Linux systems by using for loop script

dezavu · 07-16-2011, 06:34 AM

Hi,

I want to scp certain file(s)/folder to multiple Linux systems at a single point of time by using "for loop script". Please help me.

Thanks & Regards,
Vijay

TB0ne · 07-16-2011, 02:14 PM

Quote:

Originally Posted by dezavu

Hi,
I want to scp certain file(s)/folder to multiple Linux systems at a single point of time by using "for loop script". Please help me.

We will be glad to HELP you...post what you've written and tried, and where you're getting stuck, and we can assist. But we're not going to write your scripts for you.

Also, you need to provide details, like how you're going to determine what file(s)/folder(s) you want to copy, where the list of multiple systems is going to come from, and what kind of authentication you're going to use.

Blinker_Fluid · 07-18-2011, 01:22 PM

First off you ought to have your ssh keys set up on all systems or it's going to prompt you every time it goes to another server.

Basic For loop syntax:

Code:

for i in server1 server2 server3; do (the thing you want done $i represents your list) ; done

so example to pull a hosts file from every server and save it as the server#_hostsfile

Code:

for i in server1 server2 server3; do scp $i:/etc/hosts $i_hostsfile ; done

It's not really a single point in time though if your files are large. The for loop moves sequentially so if each takes 10 seconds to complete then system1 = 0 seconds, system2 = +10 seconds, System3 = +20 seconds, etc. If your list is 100 servers long you would have a 1000 seconds difference between the first and last.

dezavu · 07-27-2011, 02:48 AM

Thanks. Now I wants to execute some scripts/commands from another system to the target system(s), by using "for loop". How do I do?

Thanks & Regards,
Vijay

TB0ne · 07-27-2011, 08:51 AM

Quote:

Originally Posted by dezavu

Thanks. Now I wants to execute some scripts/commands from another system to the target system(s), by using "for loop". How do I do?

You were told how to above. You were also asked to post what you've written so far, and directed to look up one of the THOUSANDS of VERY easy to find bash scripting tutorials.

Did you do any of those?

SL00b · 07-27-2011, 08:57 AM

Stealing a previous example to show how to execute a script on a remote system via ssh, first create the script on the local system you'll be running it from, then:

Code:

for i in server1 server2 server3; do ssh user@$i 'bash -s' < /path/to/script.sh; done

dezavu · 08-02-2011, 03:11 PM

Thank You!!!!!!

dezavu · 05-22-2012, 11:36 PM

Thank You!

Now I want to create for loop for creating multiple file systems in one shot in sequence! Is it possible & if yes then how?
It will be great help for me!

Thanks & Regards,
Vijay

chrism01 · 05-22-2012, 11:43 PM

This thread was a year old and that's a new qn; please start a new thread with a good title