Installation profiles define additional steps that run after the base
installation of Drupal is completed. They may also offer additional
functionality and change the behavior of the site.
WHAT TO PLACE IN THIS DIRECTORY?
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Place downloaded and custom installation profiles in this directory.
Note that installation profiles are generally provided as part of a Drupal
distribution.
DOWNLOAD ADDITIONAL DISTRIBUTIONS
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Contributed distributions from the Drupal community may be downloaded at
https://www.drupal.org/project/project_distribution.
MULTISITE CONFIGURATION
-----------------------
In multisite configurations, installation profiles found in this directory are
available to all sites during their initial site installation.
MORE INFORMATION
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Refer to the "Installation profiles" section of the README.md in the Drupal
root directory for further information on extending Drupal with custom profiles.