Hi Aziz,
To run the rpt file you need Crystal reports designer or Crystal reports Viewer.
Crystal Reports tool would give you acces to edit and interact with the report. However if its a Linux box then I think you need a Crystal Reports Viewer.
Crystal Reports Viewer which is part of Business Objects Crystal servers, with it you can interact with the report but cannot edit it.
For more information please refer the following link
: http://help.sap.com/businessobject/product_guides/crs2013/en/crs2013_install_linux_en.pdf
- Shaan