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INSTALLING TYPO3
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TYPO3 is an open source PHP based web content management system released
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under the GNU GPL. TYPO3 is copyright © 1999-2022 by Kasper Skaarhoj.
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Official Installation and Upgrade Guide
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You can find instructions regarding installation at
https://docs.typo3.org/installation and instructions on upgrading at https://docs.typo3.org/upgrade
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Server system requirements
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Find the official system requirements in TYPO3's [documentation](https://docs.typo3.org/system-requirements).
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TYPO3 Security
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To ensure a secure installation, you have to make sure that you keep
your TYPO3 core and the extensions up to date.
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* Subscribe to the announcement mailing list. This will inform you about
  new releases of the TYPO3 core and security bulletins of core and
  community extensions.
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  http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce

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* Please refer to official TYPO3 Security Guide for further information
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  about security-related topics of TYPO3 CMS and the resources compiled
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  by the Security Team. https://docs.typo3.org/security
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  https://typo3.org/teams/security/resources/
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* Please consider also hardening your TYPO3 instance further by
  adjusting permissions on non-changing files/folders.
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TYPO3 Contribution Guide
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You can find further information in the
[README.md](README.md#contributing).