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Add information about Composer 2 compatibility #8474

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2 changes: 2 additions & 0 deletions src/guides/v2.4/comp-mgr/cli/cli-upgrade.md
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@ You can upgrade your Magento application from the command line if you installed
{:.bs-callout-info}
Do not use this method to upgrade if you cloned the Magento 2 GitHub repository. Instead, see [Update the Magento application][] for upgrade instructions.

The following instructions show you how to upgrade Magento using Composer. Magento 2.4.2 introduced support for Composer 2. If you are attempting to upgrade from Magento <2.4.1, you must first upgrade to a version of Magento that is compatible with Composer 2 (for example, 2.4.2) using Composer 1 _before_ upgrading to Composer 2 for Magento >2.4.2 upgrades.

## Before you begin {#prerequisites}

Complete the following prerequisites to prepare your environment before starting the upgrade process:
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7 changes: 4 additions & 3 deletions src/guides/v2.4/install-gde/system-requirements.md
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Expand Up @@ -9,7 +9,7 @@ redirect_from:
- /guides/v2.4/install-gde/system-requirements-tech.html
---

{:.bs-calloout-info}
{:.bs-callout-info}
If you are working on a {{site.data.var.ece}} project, see [Service versions]({{ site.baseurl }}/cloud/project/services.html#service-versions) in the _Cloud Guide_.

## Operating systems (Linux x86-64)
Expand All @@ -29,7 +29,8 @@ Upgrading the Magento applications and extensions you obtain from Magento Market

[Composer][] is required for developers who wish to contribute to the Magento 2 codebase or anyone who wishes to develop Magento extensions.

Magento does not support Composer 2.x.
* Magento 2.4.2 and later is compatible with Composer 1.x and 2.x.
* Magento 2.4.1 and earlier is compatible with Composer 1.x only.

## Web servers

Expand Down Expand Up @@ -88,7 +89,7 @@ Magento no longer supports Elasticsearch [2.x, 5.x, and 6.x][].

* A valid [security certificate][] is required for HTTPS.
* Self-signed SSL certificates are not supported.
* Transport Layer Security (TLS) requirement - PayPal and `repo.magento.com` both require TLS 1.2 or later:
* Transport Layer Security (TLS) requirement - PayPal and `repo.magento.com` both require TLS 1.2 or later.

### Required system dependencies

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