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  1. or download this
      system($cmd);
  2. or download this
      /usr/bin/rsh somehost -l someuser "ls -l" >> /tmp/someFile
  3. or download this
      my $cmd = qq[$rsh $host -l $id "$command" >> $someFile];
  system($cmd);
  4. or download this
      my $output = IO::File->new("|tee $someFile");
  local *STDOUT;
  open STDOUT, '>&', $output;
  5. or download this
      my $cmd = qq[$rsh $host -l $id "$command"];
  system($cmd);
  6. or download this
      my @cmd = ($rsh, $host, '-l', $id, $command);
  print "Executing: ", join(' ', @cmd), "\n";
  system(@cmd)