iPod management software for Linux
Solution 1:
GtkPod will work, it isn't the most beautiful but it is functional.
Solution 2:
You could try Floola. Banshee may work, I'm not sure about newer iPods.
Solution 3:
Songbird is quite good for the music management on an iPod.
Solution 4:
Most music players in Linux support most ipod products (with the exception of iPod touch cos that is really a stripped down version of the iPhone).
You can checkout this article 10 Alternatives to iTunes for managing your iPod
Please be reminded that some applications such as Songbird requires additional plugin to support iPod.