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This may be a small question but I am curious, why is the extension installation process from admin in Magento 2.x not same as in Magento 1.x (viz. Paste extension key to install) ?

To be brief:

In Magento 1

We can install an extension or package by simply Pasting the extension key.

In Magento 2

For upgrade or update, we must use the same authentication keys that were used to install the Magento software.

  1. Why is the whole installation process different ?

  2. Why is the extension installation process in Magento 2, linked to the authentication keys ?

A brief answer will be appreciated.

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In Magento 2, the extension installer is a web interface for and fetches extensions from the composer repository repo.magento.com. This repository also contains paid extensions from the marketplace and that's why you need your authentication keys: to determine which extensions you are allowed to install.

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  • Useful and thanks, please answer "Why is the whole installation process different ?"
    – Krishna ijjada
    Commented Aug 30, 2016 at 7:06
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    Because the old installation process would not work anymore since Magento is built with composer as package manager now.
    – Fabian Schmengler
    Commented Aug 30, 2016 at 7:07

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