How can I get STDERR and STDOUT of a command executed on a remote machine through SSH in Perl?

Question

I have to connect to a remote machine via SSH executed through Expect module. I have to access the STDERR / STDOUT separately if possible and look at the output. I can redirect the output of the script eg

$command = "ssh <script> 2>/tmp/stderr.output"
$exp = Expect->spawn($command) or die "Cannot spawn\n";;
my @command1= $exp->expect(5);

but then I have to remotely connect again to check stderr.output . Is there a way that expect returns the STDERR / STDOUT separately.

Answer 1

You might want to consider using Net::OpenSSH which provides a capture2 method:

($output, $errput) = $ssh->capture2(\%opts, @cmd)

captures the output sent to both stdout and stderr by @cmd on the remote machine.