Script for Multiple Runs

[Gideon2]

Hi,

Would like to know how I will create a script that will let me run multiple scp commands? That will copy files one at a time from 8 servers.

I already figured out the complete scp syntax, I just don't know how to make them run in sequence...

[atreyu]

Just put them all one after the other in a script. Or separate them with a semi-colon, but new lines are easier to read. put the command line interpreter at the top of the script (e.g., /bin/bash), and make sure the script is executable. that's about it. here's an example script, called scp-script.sh:

#!/bin/bash

scp file1.txt remotepc1:/tmp
scp file1.txt remotepc2:/tmp
scp file1.txt remotepc3:/tmp
#etc

Of course, you can use a bash loop to make the script less repetitive.

now to make it executable:

chmod +x scp-script.sh

and then to run it;

./scp-script.sh

[Rubberman]

He probably wants to avoid inputting the password every time... Create a public/private keypair, install the public part on the servers in question, install the private part (the .pem file) on the client in ~/.ssh, configure the servers sshd to allow passwordless (but key authenticated) logins, and then use the -i path-to-pem-file option for ssh. You use the ssh-keygen program to generate your keys.

FWIW, that's what we do to allow access to our cloud-based servers. Only authorized people get a copy of the appropriate keys and security gets really cranky when they have to change and redistribute them because someone had a brain-fart!

[Gideon2]

He probably wants to avoid inputting the password every time... Create a public/private keypair, install the public part on the servers in question, install the private part (the .pem file) on the client in ~/.ssh, configure the servers sshd to allow passwordless (but key authenticated) logins, and then use the -i path-to-pem-file option for ssh. You use the ssh-keygen program to generate your keys.

FWIW, that's what we do to allow access to our cloud-based servers. Only authorized people get a copy of the appropriate keys and security gets really cranky when they have to change and redistribute them because someone had a brain-fart!

Hi Rubberman, thanks for the info about the -i. I have already created the private and public keys for both my test servers.

[jgezau]

Just create a for loop.

#!/bin/bash

count=10
for (( i = 1; i < $count; i++ )); do
  # put code here
  scp file[$i].txt remotepc[$i]:/tmp
done

And make the the script executable