iPodLinux is a µClinux-based Linux distribution designed specifically to run on Apple Inc.'s iPod. When the iPodLinux kernel is booted it takes the place of Apple's iPod operating system and automatically loads Podzilla, an alternative GUI and launcher for a number of additional included programs such as a video player, an image viewer, a command line shell, games, emulators for video game consoles, programming demos, and other experimental or occasionally unfinished software.iPodLinux in essence consists of a graphical booting Linux kernel built from µClinux sources using the uClibc C standard library with driver code for iPod components (or reverse engineered drivers where available). It includes userland programs from µClinux and/or BusyBox, a UNIX-style file system (which can be created within HFS+ formatted iPods, or an ext2 partition on FAT32 formatted iPod), and the Podzilla GUI (and its modules). iPodLinux's default behaviors borrow elements from the default Apple iPod OS, Linux, and the imaginations of the coders.[citation needed] Apple's proprietary iPod OS in contrast uses an invisible boot loader and is based on an ARM processor kernel originally written by Pixo and the iPod browser program, a GUI written by Apple and Pixo using the Pixo application framework, and other firmware and component drivers written from manufacturer's reference code to support the standard behavior Apple wanted iPod to have.
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