Shell Programming and Scripting

Hi Experts,

Need some help.


I am trying below code programatically to login to ssh ip from a csv file.
the below code logging into all servers and executing some command line syntax. But what I need is for example if i have 5 IP's ,if first one connects successfully and executes the commands then i want program to exit if not it has to login into 2nd IP check whether it will be able to access it and issue comands and get me output...like this...

and also the IP have .pem key authetication...so how would i modify below program to allow ssh with pem key

Code:

#!/bin/bash
USERNAME=someUser
HOSTS="host1 host2 host3"
SCRIPT="pwd; ls"
for HOSTNAME in ${HOSTS} ; do
    ssh -l ${USERNAME} ${HOSTNAME} "${SCRIPT}"
done

Moderator's Comments:

Please wrap all code, files, input & output/errors in CODE tags. It makes it far easier to read and preserves spaces for indenting or fixed-width data.

do it like this...

Code:

#!/bin/bash

USERNAME=someUser
HOSTS="host1 host2 host3"
SCRIPT="pwd; ls"
for HOSTNAME in ${HOSTS} ; do
ssh -l ${USERNAME} ${HOSTNAME} "${SCRIPT}" && break
done

&& break causes the shell when the prior command is successful to skip the rest of the loop immediately. Since you do not have any commands after the loop the program is ending then.

Notes

What if host1 and host3 has same password but host2 has different one

The script does not handle passwords. Either the ssh prompts for a password, or an authorized ssh key has been set.