iTunes cannot be installed as Barry has said. There are alternatives
though. You can manage music and music players quite nicely without iTunes
in Linux. I realize this is inconvenient since people often have vast
stores of music and time invested in them. You can transfer the files and
manage them with a Linux application and there are several music stores
that do support Linux. It is just a question of biting the bullet and
making the transition.

Apple is not Linux friendly. Even less so than Microsoft. They want to
create a dependency on them and Linux is for freeing the user. You either
buy into one or the other. There does not seem to be much option for
combining the two. However, there is some hope however distant. There is a
project similar to Wine called the Darling Project. (Wine is made to look
Windows in name but stands for wine is not an emulator. Darling is a play
on Darwin on which OS/X is based.)

www.phoronix.com/scan.php

This project has mind blowing potential. Imagine Photoshop running on
Linux. Also it is likely to be more successful than Wine because Linux is
closer to OS/X in terms of family tree. It is still in development.