# calibre-server > A server application to distribute e-books over a network. > Note: e-books must already be imported into the library using the GUI or the `calibredb` CLI. > More information: . - Start a server to distribute e-books. Access at : `calibre-server` - Start server on different port. Access at : `calibre-server --port {{port}}` - Password protect the server: `calibre-server --username {{username}} --password {{password}}`