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# 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, macOS 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.com.

Nextcloud server is available:

- As a free, full featured community-supported server, with all enterprise features.
- Or with full enterprise support, including phone and email access to Nextcloud developers.

## Videos and blogs

See the official Nextcloud channel on YouTube for tutorials, overviews, and conference videos.

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
- Nextcloud Desktop Client
- Nextcloud Android App

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