Update Drupal Core

This describes a quick process of updating Drupal core.

1. Make back-ups.

Then run the composer command

See: https://www.drupal.org/project/drupal/releases/10.1.6

To start a new Drupal project with version 10.1.6:

composer create-project drupal/recommended-project:10.1.6 "install-dir"

To update your site and all dependencies to the latest version of Drupal:

composer update "drupal/core-*" --with-all-dependencies

To update your site to this specific release:

composer require drupal/core-recommended:10.1.6 drupal/core-composer-scaffold:10.1.6 drupal/core-project-message:10.1.6 --update-with-all-dependencies

The stuff below is likely to cause problems within composer...

composer update drupal/core-recommended --with-all-dependencies

or

composer update drupal/core-recommended --with-dependencies (this tends to work when the above doesn't)

If the composer command --with-all-dependencies does not work then the command --with-dependencies may work.