Server Default Page - How to change the HTML and CSS?

  • Hello,

    I would like to change the standard Server Default Page, which looks like this:


    I found another thread regarding this topic which is already closed: Server default page




    are the directories where content for this seems to be stored, in both there is the "inc" folder with the CSS files and the index.html.

    If I want to change it, can I just replace it? If yes, should I replace both paths or just one?

    What I don't understand about this from the linked thread, is: "than reupload the new version (remove the old plugins version and upload the new one). So the rights will also be correct.."
    What should I do according to this and why?

    Thank you for your help!