scp an image to multiple Ubuntu servers at once

linuxnoob45 · 04-18-2017, 03:10 PM

Hello I'm fairly new to Linux but I have a 10 Ubuntu servers that I want to push an image to. I wanted to put this image on one of the servers and have it push it to all the other ones. What would a script look like for something like that or what would be the best way to get something like this done? I figured I could just scp but it would be nice to have some kind of script that would automatically push this image to every server. I really appreciate any help thank you guys

teckk · 04-18-2017, 04:41 PM

Show what you have so far, someone will be glad to help you. Depends on how you want to do it. Very simple examples:

Code:

#! /usr/bin/env bash

#List of IP addresses
list="
192.168.0.1
192.168.0.2
192.168.0.3
"

#Loop
for i in $list; do
    scp file.jpg user@$i:/path/to/
done

Or if each machine has a different user

Code:

read -p "Enter file name for transfer" fname

scp "$fname" user1@192.168.0.1:/path/to
scp "$fname" user2@192.168.0.2:/path/to
scp "$fname" user3@192.168.0.3:/path/to

or

Code:

for i in host1 host2 host3; do
    scp file.jpg user@$i:/path/to
done

etc....

Habitual · 04-18-2017, 05:03 PM

That's a lot of logging in.

Code:

ssh-keygen -f /path/to/file_rsa -t rsa -N '' -b 4096 -q

http://rsync.net/resources/howto/rsync.html

linuxnoob45 · 04-18-2017, 10:31 PM

Quote:

Originally Posted by Habitual

That's a lot of logging in.

Code:

ssh-keygen -f /path/to/file_rsa -t rsa -N '' -b 4096 -q

http://rsync.net/resources/howto/rsync.html

I like the rsync idea but there's 10 servers now and I'd like to be able to do it to 100 servers soon. I could probably make a script with all the IPs (all remote) and have if rsync all of them? I'm extremely new to scripting I'll have to learn some more before I could make a script like that.

frankbell · 04-18-2017, 10:41 PM

There is cluster ssh, which I learned about from TLLTS.

There is also cluster scp; it might be worth a look.

Habitual · 04-19-2017, 04:34 AM

Quote:

Originally Posted by linuxnoob45

I like the rsync idea but there's 10 servers now and I'd like to be able to do it to 100 servers soon. I could probably make a script with all the IPs (all remote) and have if rsync all of them? I'm extremely new to scripting I'll have to learn some more before I could make a script like that.

Then learn soon?
10 hosts is a great manageable start, for a guy with no skill and no script and no ssh-keys.

TenTenths · 04-19-2017, 07:50 AM

If you're ever going to do more than one task/job like that then Rundeck FTW!

Habitual · 04-19-2017, 11:17 AM

rundeck is good stuff.

OP: see also https://www.linuxquestions.org/quest...4/#post5691995