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README.md

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-# XenOrchestraInstallerUpdater
-Xen-Orcestra installer/updater
+# XenOrchestraInstallerUpdater - Install / Update Xen-Orchestra from sources
+
+## In a nutshell
+
+This tool will will install and update [Xen Orchestra](https://xen-orchestra.com/#!/) automatically. xo-server and xo-web components are built from sources.
+
+## Instructions
+
+Clone this repository and run xo-install.sh script as root
+
+Tool has been tested to work with following distros:
+
+- CentOS 7
+- Debian 8
+- Ubuntu 16.05
+
+CentOS was tested without SELinux. You need to deal with labels yourself if you want to use it.
+
+## Notes
+
+Tool makes all necessary changes required for Xen-Orchestra to run (including packages, user creation, permissions). Please evaluate script if needed.
+I take no responsibility of possible damage caused by this tool.
+
+Below is a list of packages that will be installed (if required) if missing.
+
+```
+CentOS:
+- curl
+- epel-release
+- nodejs
+- npm
+- yarn
+- gcc
+- gcc+
+- make
+- openssl-devel
+- redis
+- libpng-devel
+- python
+- git
+
+Debian/Ubuntu:
+- apt-transport
+- ca-certificates
+- curl
+- yarn
+- nodejs
+- npm
+- build-essential
+- redis-server
+- libpng-dev
+- git
+- python-minimal
+```