$/ is the input line separator, set to newline by default. $\ is the output record separator, set to undef by default. Several of these examples have not addressed these. It sounds like the OP is going to iterate over a list of system names and assemble the directory in parts. Single quotes and concatenation recommended: 
  my $nodename = 'pcname-vm';
  my $directory = '//'.$nodename.'/c$/program files/adobe';

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In reply to Re^2: Quickest way to get a list of all folders in a directory by mweb
in thread Quickest way to get a list of all folders in a directory by Anonymous Monk

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