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    my @host;
    while (my $line = <$fh>) {
        $line =~ s/^\s+//; $line =~ s/\s+$//;
        push @host, string_glob_permute($line) if $line =~ /^[^#\s]/;
    }
    [ List::Util::uniq @host ];
}

1;
__END__

=encoding utf-8

=for stopwords passphrase

=head1 NAME

App::RemoteCommand - simple remote command launcher via ssh

=head1 SYNOPSIS

  $ rcommand [OPTIONS] HOSTS COMMANDS
  $ rcommand [OPTIONS] --script SCRIPT HOSTS
  $ rcommand [OPTIONS] --host-file FILE COMMANDS

See L<rcommad|https://metacpan.org/pod/distribution/App-RemoteCommand/script/rcommand>.

=head1 DESCRIPTION

=begin html

<a href="https://asciinema.org/a/119109?autoplay=1" target="_blank"><img src="https://asciinema.org/a/119109.png" alto="usage" /></a>

=end html

App::RemoteCommand is a simple remote command launcher via ssh. The features are:

=over 4

=item * execute remote command in parallel

=item * remember sudo password first, and never ask again

=item * you may specify a script file in local machine

=item * append hostname and time to each command output lines

=item * report success/fail summary

=back

=head1 CAVEATS

Currently this module assumes you can ssh the target hosts
without password or passphrase.
So if your ssh identity (ssh private key) requires a passphrase,
please use C<ssh-agent>.

=head1 ARTIFACT ATTESTATIONS

GitHub Artifact Attestations are generated for release tarballs uploaded to
CPAN. If you care about provenance for the uploaded tarballs, see:

L<https://github.com/skaji/App-RemoteCommand/attestations>

=head1 COPYRIGHT AND LICENSE

Copyright 2016 Shoichi Kaji <skaji@cpan.org>

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

=cut