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Is it possible to install 2 linux distros into 1 root, so they share same uuid and guid, configs and packages + same user /home folder ? For example: I have Ubuntu and Windows 7 already in dual boot on my laptop. Could I install Arch's base, base-devel and kernel, so it won't conflict with Ubuntu on the same root folder? P.S I don't feel like repartitioning my drive again, 'cause there's very complicated hierarchy, which occupies the entire disk. =)

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Sharing packages is not possible: Ubuntu and Arch use different packaging systems. And Arch's /etc would overwrite Ubuntu's /etc (or vice-versa), destroying one (or both) of the systems in the process.

However, you can share /home between distros by putting it in a separate partition and then adding an entry in /etc/fstab to mount it.

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You can install multiple Linux on a hard drive, but you must comply with minimum restrictions:

A. - Each must have a Linux root partition: Because they use a different package manager and information of different versions of installed packages. If you share the root partition, you risk breaking the system consistency. 2. - You can use a boot partition and a swap partition for multiple Linux shared.

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