Ejecutar Jar En Linux

So I then clicked on "how do I manually upgrade my Netgear router". First step is to go to Netgear download center. I entered the Product Name which is R7500 (not V2). The download option is "Firmware version 1.0.0.130. When I click on that it immediately downloads the box in the lower left corner titled "R7500-V1.0.0.130.zip". When I open that file it has 2 entries: R7500-V1.0.0.130, and the release notes. The file is a disc image file, and if I right click or left click, it opens the windows disc image burner. I can't get the file into a usable form.