drupal 7 new module install link don't show

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When i go to modules tab i can't find "new module install" link

Please tell me how to view this new module install link in drupal-7

How do I enable Drupal modules?

Using the Drupal User Interface (easy): Navigate to the Extend page (admin/modules) via the Manage administrative menu. Locate the module(s) you wish to enable and check the box next to each one. Click Install to enable (turn on) the new module(s)

You're also missing the "Update" tab which leads me to believe you don't have the "Update Manager" module enabled. It's in the list under "Core", just enable that and the "Install new module" link will appear.