Systemless root is what you'll have unless you can build Android for your phone and install it. Since this doesn't modify the system partition, it was called a systemless root. When Android 5.0 was released things changed and the boot image - software that does exactly what you think it does: boot up Android on your phone - need to be modified so that the su daemon was launched. To make both of these things happen, files in the phone's system folder had to be modified. This daemon (that's what these sorts of processes are called) also needs special permissions so it can work as intended. Since the release of Android 4.3, the process that handles requests for root access has to run as soon as you turn on your phone. When you're doing things with superuser permissions, you have the power to do anything.Įverything described above is how Linux-based systems normally work, and how Android worked before version 4.3. This includes things we want to do, like uninstall application forced on us, or things we don't want to do that can put your Android in an unusable state. The difference is the root user (superuser) has permission to do anything to any file anywhere in the system. Apps you install are also given a type of user ID, and they all have permissions to do certain things - you see those when you install them on older versions of Android, or you are prompted to allow them on Marshmallow or higher - in certain folders with certain files. You are a user when you sign in, and you are allowed to do certain things based on your user permissions. Your Android phone uses Linux permissions and file-system ownership. Root, at least the way we're talking about it here, is the superuser. When you root your Android, you're simply adding a standard Linux function that was removed.
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