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I heard that Ubuntu is open source and that all its source code is available, but I have never seen its code. I want to start learning about Ubuntu's kernel and its complete working.Please suggest me some reading from where I can start.

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marked as duplicate by Uri Herrera, fossfreedom Feb 7 '13 at 9:39

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You can download the source code of ubuntu kernel, using

sudo apt-get install linux-source

A bzip file will be downloaded at /usr/src/ containing the source code.

However, ubuntu codes are taken from the orginal linux kernel which is available for download at

To understand the kernel, you must start with basics of operating system.How kernel works, a general idea about subsystem/modules/drivers. Also needed very good knowledge C (specially pointers). Otherwise jumping into code of linux kernel won't help at all.

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+1 for adding a reference to –  don.joey Feb 7 '13 at 6:49

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