This is a beta release of documentation for Magento 2.4, published for previewing soon-to-be-released functionality. Content in this version is subject to change. Links to the v2.4 code base may not properly resolve until the code is officially released.
You must install Elasticsearch before installing Magento Commerce or Magento Open Source 2.4.0. See Elasticsearch for details.

Is the Magento software installed already?

To determine if the Magento software is installed already, you can access the Magento Admin (administration console) or storefront using a web browser.

Prerequisite: You must know the Magento server’s hostname or IP address, and the URL to access the Magento installation. If you’re not sure, find the information from your system administrator or hosting provider.

Then open a web browser and go to the URL you were provided. Some examples follow:

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http://www.example.com/magento2/admin
https://www.example.com/admin
http://www.example.com

If a 404 (Not Found) error displays, Magento probably isn’t installed. You should confirm that with your system administrator or hosting provider.

If Magento is installed, you should see something like the following after you log in:

Magento Admin:

Magento Admin which verifies a successful installation

Magento storefront:

Magento storefront which verifies a successful installation

What if Magento is installed?

If Magento is installed and you want to manage or upgrade the Magento software or components, see the Upgrade Guide.

A Magento component is an extension, language package, or theme. You must use the command line to install, uninstall, update, enable, or disable components.