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As a minor release it is a simple upgrade from 4.2.0 with no architectural changes. CloudStack Management Servers Services, and all SystemVMs will require a restart.

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##Documentation

The 4.2.1 release notes includes full list of corrected issues as well as upgrade instructions from previous versions of Apache CloudStack. Please see the Release Notes for a full list of corrected issues and upgrade instructions.

The official installation, administration and API documentation for each release are available on our Documentation Page.

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##Downloads

The official source code for the 4.2 release can be downloaded from our Downloads Page.

In addition to the official source code release, individual contributors have also made convenience binaries available on the Apache CloudStack download page.

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##Downloads

The official source code release can be downloaded from: http://cloudstack.apache.org/downloads.html

In addition to the official source code release, individual contributors have also made convenience binaries available on the Apache CloudStack download page.

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##About Apache CloudStack

Apache CloudStack is an integrated Infrastructure-as-a-Service (IaaS) software platform that allows users to build feature-rich public and private cloud environments. CloudStack includes an intuitive user interface and rich APIs for managing the compute, networking, software, and storage infrastructure resources. The project became an Apache top level project in March 2013.

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