How to uncompress and list an initramfs content on Linux
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Suppose we have our Linux system setup with an almost-full disk encryption, with only the /boot partition unencrypted. Assuming we achieved encryption by using a LUKS container, we need the appropriate software to unlock it at boot. This software, however, is part of the encrypted system. Since the Linux 2.6 series, the solution to this, and other similar problems, is called initramfs (Initial ramfs). In this article we see how an initramfs is composed and how to extract or list its content.
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