Re: Net::OpenSSH and Extreme Switch

Usually these boxes do not allow running single commands via SSH but just a custom/restricted shell.

What happens when you try to invoke the remote command with SSH as in...?

$ /usr/local/bin/ssh auto_config@management show vlan
[download]

If it doesn't work, your best option will probably be to use Expect (alone, combined with Net::OpenSSH or via Net::SSH::Expect).

For simple cases, usually this also works:

my $out = $ssh->capture({stdin_data => "show vlan\n"});
print "output: $out"
[download]

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Re^2: Net::OpenSSH and Extreme Switch by rdl (Initiate) on Nov 23, 2009 at 22:09 UTC
Salva, thanks for the reply. When I try your suggestion from the command line, I get no reply (or error) at all. For the second, I modified the script as you suggested `my $test = $ssh->capture( {stdin_data => "show vlan\n"} );` [download] and I now get the following: `Keyboard-interactive authentication Sending a command Pseudo-terminal will not be allocated because stdin is not a terminal. Operation did not work: child exited with code 255 at ./ssh1.pl line 1 +3. Output is: show vlan` [download] I guess I don't understand why if it works from the command line using OpenSSH, it won't work from the script. Thanks	[reply] [d/l] [select]
Re^3: Net::OpenSSH and Extreme Switch by salva (Canon) on Nov 23, 2009 at 22:24 UTC
I guess I don't understand why if it works from the command line using OpenSSH, it won't work from the script. See Re: Unable to run command on Cisco switch.	[reply]
Re^4: Net::OpenSSH and Extreme Switch by rdl (Initiate) on Nov 24, 2009 at 21:18 UTC
According to Extreme, they officially do not support 1 line ssh commands and do not seem interested in changing that. Strike one for Extreme switches thanks again!	[reply]
Re^5: Net::OpenSSH and Extreme Switch by rdl (Initiate) on Dec 02, 2009 at 20:35 UTC
Re^4: Net::OpenSSH and Extreme Switch by rdl (Initiate) on Nov 24, 2009 at 14:13 UTC
Salva, thanks for the clarification. I believe that I am starting to understand now. Not being big on SSH (Ok, I simply don't like it), I did not understand the two modes. I have a script that I have been using for several years using the Net::Telnet module with great success. I am trying to migrate this script to using SSH but not having a lot of luck. Was hoping that this module would be more of a "drop in" replacement (understanding that specifics would have to change). I was hoping to avoid expect, but will look into that option further. Thanks again for the support.	[reply]