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# Nextcloud 9 Server Administration Manual Introduction

## Introduction

Welcome to the Nextcloud Server Administration Guide. This guide describes administration tasks for Nextcloud, the flexible open source file synchronization and sharing solution. Nextcloud includes the Nextcloud server, which runs on Linux, client applications for Microsoft Windows, Mac OS X and Linux, and mobile clients for the Android and Apple iOS operating systems.

Current editions of Nextcloud manuals are always available online at docs.nextcloud.org.

If you need more and business-level support you can go here.

## Nextcloud Videos and Blogs

Visit Nextcloud Planet for news and developer blogs.

## Target Audience

This guide is for users who want to install, administer, and optimize their Nextcloud servers. To learn more about the Nextcloud Web user interface, and desktop and mobile clients, please refer to their respective manuals:

- Nextcloud User Manual
- ownCloud Desktop Client
- Nextcloud Android App

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