Error while executing a command using Net::SSH::Expect

[lamp]

Dear monks,

I am writing a script to check the installed perl modules and its versions in different remote systems. I am using 'Net::SSH::Expect' module for executing the command in remote systems. The following is the sample code.

#!/usr/bin/perl
use Net::SSH::Expect;

my $host = "testserver";
my $user = "test";
my $password = "pass";


 my $ssh = Net::SSH::Expect->new (
            host => $host,
            password=> $password,
            user => $user,
            raw_pty => 1,
            timeout => 10
        );

 my $login_output = $ssh->login();

my $cmd = qq(perl -e 'use ExtUtils::Installed; my ($inst) = ExtUtils::
+Installed->new(); my (@modules) = $inst->modules(); map { print $_ . 
+":" . $inst->version($_) ."\n";  }@modules;');

my $res = $ssh->exec($cmd);
print($res);

$ssh->close();

While executing the command, i'm getting the following error

>new(); my () = ->modules(); map { print  . ":" . ->version() ."
> ";  };'
Can't declare stub in "my" at -e line 1, near ") ="
syntax error at -e line 1, near "= ->modules"
syntax error at -e line 1, near ". ->version"
syntax error at -e line 2, near "};"
  (Might be a runaway multi-line "" string starting on line 1)
Execution of -e aborted due to compilation errors.

If I execute the command manually in remote server using SSH client, i'm getting the output.

Can someone throw some light on this.

-lamp

[Corion]

Debug your program by printing $cmd before you send it for execution to the remote machine. See perlop on how double-quotes (and qq{}) work.

If you had use strict; at the top of your program, Perl would have told you what goes wrong. If you had -w on the Perl command line or use warnings; at the top of your program, Perl would have given you hints at what goes wrong.