Solaris

Hi SSHers,

I have embedded this below code in my shell script..

Code:

 
/usr/bin/ssh -t $USER@$SERVER1 /usr/bin/ssh $USER2@S$SERVER2 echo uptime:`/opt/OV/bin/snmpget -r 0 -t 60 $nodeName system.3.0 | cut -d: -f3-5`

SSH to both these servers are public-key authenticated, so things run smoothly until it comes to the execution of the commands..

It gives me the follow output for the shell script..

Code:

ksh: /opt/OV/bin/snmpget:  not found
uptime:

I am assuming that the command '/opt/OV/bin/snmpget' got executed in the second server and since there is no such executable there the error comes up..
Also, in the final target server i get a valid output for the command '/opt/OV/bin/snmpget'..

Could someone help me execute both the commands on the same target server or tell me what i could be doing wrong here?

Thanks In Advance,
Blub

I think your issue is a "shell substitution before execution" issue. (See this section 2.1 #4) Try this:

Code:

/usr/bin/ssh -t $USER@$SERVER1 /usr/bin/ssh $USER2@S$SERVER2 echo uptime:\\\`/opt/OV/bin/snmpget -r 0 -t 60 $nodeName system.3.0 | cut -d: -f3-5\\\`

The "snmpget" was executing on $SERVER1. That's where the "snmpget: not found" error came. By using the backslashes, the execution is delayed until access to $SERVER2 is authenticated.


HTH

Thanks for your tip, bluescreen.. tried what you had asked me to, but that seems to fail.. Here's the output i got

Code:

 
cut: invalid character in range

I will try to change the shell script as per the tips provided in the link..


Wish you a Merry Christmas,
Blub..

I got this to work:

Code:

$ ssh -t $SERVER1 /usr/bin/ssh $SERVER2 echo uptime: \\\`uptime \\\| cut -d: -f3-5 \\\`

Notice the "\\\" before the pipe. Sorry I forgot that in my previous post.

Thanks again bluescreen.. Would you by any chance have any link that isnt as detailed as the one you had sent?
I tried another method and implemented the above shell using two shell scripts, one which is a wrapper sitting in the source, the other does the main functionality, and sits in the First hop server.. This seems to work fine..

I will try escaping the pipes and see if that does any good.. Thanks once more mate..

Regards,
Blub

i suggest writing simple scripts and then execute the scripts instead of battling with shell metacharacters. it will make your life much easier.

true, but just wanted to know how to get it working.. thats all