Question

In the following code I need to print output from the variables $stout, $stderr. How can I do this and not without using $ssh = Net::SSH::Perl->new?

#!/usr/bin/perl
use strict;
use warnings;
use Net::SSH::Perl;
use FindBin qw($RealBin);
use File::Basename;
use lib "/nfs/site/proj/dpg/tools/lib/perl";
use Util;
use Getopt::Std;
use Net::SSH::Perl;
use Cwd;
use File::Copy;

my $host = 'someip.com.com';
my $pass = '';
my $user = '';
my $cmd  = 'pwd';

my($stdout,$stderr,$exit) = system('ssh someip.com cat /nfs/site/home/aa/test11.txt')        ;
if ($stdout) {
    print "Standard output is \n$stdout";
} elsif($stderr) {
    print "Standard error is \n$stderr";
}

Answer 1

I use IO::CaptureOutput, its simpler.

use strict;
use warnings;

use IO::CaptureOutput qw(capture_exec);

my $cmd = "ssh someip.com cat /nfs/site/home/aa/test11.txt";
my ($stdout, $stderr, $success, $exitcode) = capture_exec( $cmd );

You can also use list parameters in capture_exec which I think is safer.