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Full Discussion: Bash commands to an 'ssh' within an ssh'
Top Forums Shell Programming and Scripting Bash commands to an 'ssh' within an ssh' Post 302385674 by mcintosh.jamie on Saturday 9th of January 2010 04:29:57 AM
Old 01-09-2010
Bash commands to an 'ssh' within an ssh'
I've struggled to find a solution to this problem from searching so I thought I'd write a post to see what can be done.

I'm attempting to connect and run commands on 'server2' but because of security limitations I cannot access it directly. I can however ssh into 'server1' and then into 'server2' to issue the commands manually.

ie.
ssh user@server1
ssh server2
qfree
qstat
etc..

This works perfectly fine however I'm trying to batch hundreds to thousands of jobs using a bash script because doing each one manually would be tedious and would take me until 2015 to complete!

From looking at solutions to previous problems I've managed to get the following to work:

ssh -t user@server1 ssh server2

This takes me into 'server2' but I'm unable to run any commands using the bash script, ie.

ssh -t user@server1 "ssh server2; qfree"

Doesn't work and results in nothing happening. It's only when I 'exit' from 'server2' that I get a response from the terminal saying that the 'requested program couldn't be found'. I can only assume that the system is still trying to run the programs from 'server1' where they don't exist.

My understanding then is that it tries to run each action on 'server1', ie ssh server2 and then once it's finished with that qfree.

Is there a way to make it so that it connects to server1, then server2, and then runs a command from that server? As of yet I've had no luck and would appreciate any assistance.

Many Thanks
Jamie
 

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LEARN ABOUT CENTOS

gentest

GENTEST(1)							    Test Suite								GENTEST(1)

NAME

       gentest - Run random generic SMB operations against two SMB servers and show the differences in behavior

SYNOPSIS

       gentest {//server1/share1} {//server2/share2} {-U user%pass} {-U user%pass} [-s seed] [-o numops] [-a] [-A] [-i FILE] [-O] [-S FILE] [-L]
	       [-F] [-C] [-X]

DESCRIPTION

       gentest is a utility for detecting differences in behaviour between SMB servers. It will run a random set of generic operations against
       //server1/share1 and then the same random set against //server2/share2 and display the differences in the responses it gets.

       This utility is used by the Samba team to find differences in behaviour between Samba and Windows servers.

OPTIONS

       -U user%pass
	   Specify the user and password to use when logging on on the shares. This parameter is mandatory and has to be specified twice.

       -s seed
	   Seed the random number generator with the specified value.

       -o numops
	   Set the number of operations to perform.

       -a
	   Print the operations that are performed.

       -A
	   Backtrack to find minimal number of operations required to make the response to a certain call differ.

       -i FILE
	   Specify a file containing the names of fields that have to be ignored (such as time fields). See below for a description of the file
	   format.

       -O
	   Enable oplocks.

       -S FILE
	   Set preset seeds file. The default is gentest_seeds.dat.

       -L
	   Use preset seeds

       -F
	   Fast reconnect (just close files)

       -C
	   Continuous analysis mode

       -X
	   Analyse even when the test succeeded.

VERSION

       This man page is correct for version 4.0 of the Samba suite.

SEE ALSO

       Samba

AUTHOR

       This utility is part of the Samba[1] suite, which is developed by the global Samba Team[2].

       gentest was written by Andrew Tridgell.

       This manpage was written by Jelmer Vernooij.

NOTES

	1. Samba
	   http://www.samba.org/

	2. Samba Team
	   http://www.samba.org/samba/team/

Samba 4.0							    06/17/2014								GENTEST(1)
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