This does what you intended, I think. Consider using taint because of the way you are interacting with the file system directly without untainting your inputs.

  print "whats the File name ? ";
  chomp (my $tmp = <STDIN>);
  my $file = "/home/wanderi/$tmp";        
  open (my $info, '<', $file) or die "cant open $file";
  print while <$info>;
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