I have a machine on my LAN called "rocky" that's running Rocky Linux 8.5. My user id on it is also "rocky" and I've set up the appropriate ~/.ssh/config magic on my laptop to pass the username and key path to ssh so that ssh rocky whoami outputs rocky. I don't get prompted for a passphrase for the key because I've already ssh-add'ed it to my local ssh-agent.

My laptop is running Windows 10 with Ubuntu 20.03.4 LTS in a WSL1 container. The libnet-openssh-perl package is installed and gives me Net::OpenSSH version 0.78, but I've also tried sudo cpanm --install Net::OpenSSH to get version 0.80 and it doesn't fix the problem, which is this: when I run the following Perl program I get the error:-

channel_post_mux_listener getpeereid failed: Operation not supported
Use of uninitialized value $_[0] in join or string at /usr/share/perl5
+/Net/OpenSSH.pm line 122.
Can't ssh to rocky: unable to establish master SSH connection:  at Jun
+k/snaggle.pl line 17.

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Actually 0.80 gets rid of the "uninitialized value" error, but I still get the "getpeerid" problem. Any suggestions? Here's the script:-

#!/usr/bin/perl

use strict;
use warnings;

use Net::OpenSSH;

use constant {
    HOST        => q{rocky},
    USER        => q{rocky},
    KEYPATH     => q{~/.ssh/broadey.net_rsa},
    CMD         => q{whoami},
};

#my $ssh = Net::OpenSSH->new(HOST);
my $ssh = Net::OpenSSH->new(HOST, user=>USER, key_path=>KEYPATH);
$ssh->error and die "Can't ssh to ${\HOST}: " . $ssh->error;

my ($out,$pid) = $ssh->pipe_out(CMD) or
  die "Remote command failed: " . $ssh->error;

local $| = 1;                   # enable output autoflush

while (<$out>) {
    print time, ": ", $_;       # $_ includes the \n
}

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As you can see from the commented out code, I originally tried passing just the hostname and relying on ~/.ssh/config, but then tried passing the username and key_path to see if it made any difference. It didn't. Thanks for your help!

In reply to Net::OpenSSH channel_post_mux_listener getpeereid failed: Operation not supported [RESOLVED] by kbro

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