Ubuntu One Desktop client on Ubuntu 11.10
|Initial release||May 13, 2009|
|Operating system||Ubuntu OS,
Mac OSX 10.6 and higher,
The service enables users to store files online and sync them between computers and mobile devices, as well as stream audio and music from cloud to mobile devices.
Ubuntu One has a client application that runs on Ubuntu 9.04 and later or Windows XP or newer, and Mac OS X 10.6 and higher. Other Linux distributions are supported through a console client. The source code is available through launchpad and can easily be compiled for other unix-like operating systems such as FreeBSD. There is an Ubuntu One music app for iOS devices. A free Ubuntu One account offers 5 GB of storage.
The Ubuntu One service is similar to services such as iCloud, Dropbox, Google Play Music, SkyDrive, SpiderOak, Box.net, Mozy, Wuala, Amazon Cloud Player, Humyo, iDisk, Jungle Disk and Live Mesh. Its client code is written in Python. It uses Twisted for its low-level networking and Protocol Buffers for protocol description. Data is synced over a custom protocol called "u1storage", and stored on Amazon S3.
Ubuntu One offers automatic upload of photos taken from Android mobile devices for immediate sync across computers; integration with Mozilla Thunderbird for contacts and with Tomboy for notes due to the access to the local CouchDB instance. It also has capabilities for purchasing DRM-free music while synchronizing them automatically with an Ubuntu One Account via the Ubuntu One Music Store (in partnership with 7digital).
Ubuntu One publishes APIs for developers wishing to build applications with file and data synchronization or music streaming.
There is not yet a native client integration for the Kubuntu variant of the Ubuntu operating system (as of January 2012). Kubuntu integration is under development and has also received a grant from the Google Summer of Code 2010.
Further criticism concerns the unclear revenue share that will be granted to the community. The Amarok development team has announced that they will not add support for the Ubuntu One Music Store to the Amarok media player for the moment, unlike the Magnatune media store, which returns 10% of the revenue produced via the interface to Amarok. Notably, Ubuntu One as a service falls under European law and can therefore not become subjected to US law enforcement claims within the scope of the US Patriot Act. However, since the Ubuntu One database is outsourced to Amazon S3,  Files stored in the Ubuntu One database are not encrypted.
See also 
- "What is Ubuntu One". 13 May 2009.
- "Ubuntu One Servers in Launchpad". Retrieved 2010-10-22. "Other/Proprietary"
- "One license notice example". Retrieved 2010-10-22. "under the terms of the GNU General Public License version 3, as published by the Free Software Foundation."
- "Ubuntu One: Downloads". Retrieved 2011-10-01.
- "Ubuntu One Technical Details". Ubuntu.com. Retrieved 17 February 2012.
- "Relaxed Ubuntu 9.10: CouchDB to be Integrated - Linux Magazine Online". Linux-magazine.com. 2009-10-15. Retrieved 2010-01-26.
- "App Store - Ubuntu One Files". Retrieved 18 February 2012.
- "Ubuntu One Files - Apps on Android Market". Retrieved 18 February 2012.
- "Chrome Web Store -Ubuntu One". Retrieved 18 February 2012.
- Bug #375272 in Ubuntu One Servers: «Server software is closed source» — Launchpad
- Bradley M. Kuhn (2010-01-14). "Back Home, with Debian!". Retrieved 2010-10-22. "UbuntuOne's server side system is proprietary software with no prospects of liberation."
- "Launchpad bug #375145 - Ubuntu One should have a KDE client". Retrieved 2012-01-08.
- Kretschmann, Mark. "Ubuntu One Music Store integration • KDE Community Forums". Retrieved 16 April 2010.
- "buckman's magnatune blog: Giving money to open source". Retrieved 2011-12-03.
- "Ubuntu One : Help : FAQs-Are my files stored on the server encrypted?". Retrieved 16 Dec 2012.