I need to show a link in my node (Drupal 7) and can be download directly by guest user? Is there any module available or work with view? Thanks.
Enable "File" module (it's provided by drupal distr). Then goto content types (in Structure), add new content type or select on of exists. After saving content type see "manage fields". Add new field (fill label and field name), select Type of this = File, click Save. Then in extenstions fill pdf, and enter place of storing.
Now try create this content type, pdf file uploading will available and after saving you can see direct link to download it, if you don't see it, visit content type and check "Manage display" tab..