The GNOME Shell extension design is designed to give a high degree of power to the parts of the GNOME interface managed by the shell, such as window management and application launching. It simply loads arbitrary JavaScript and CSS. This gives developers a way to make many kinds of changes and share those changes with others, without having to patch the original source code and recompile it, and somehow distribute the patched code.
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Since Ubuntu 11.10 Oneiric, LightDM replaces GDM as the default display manager.If you want to manage lightdm you can use Simple LightDM Manager.Currently this tool only supports chaging background and logo
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GNOME Tweak Tool is an application for changing the advanced settings of GNOME 3
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Easy, browser-based Linux/UNIX administration with Webmin--step by step.
Long Description: Webmin gives you an easy, browser-based solution for virtually any day-to-day Linux/UNIX administration task. Now, there's a definitive Webmin guide for every beginning-to-intermediate sysadmin. Written by Webmin's primary developer, Managing Linux® Systems with Webmin™; delivers authoritative, step-by-step coverage of the latest version of Webmin, from basic installation to centrally managing multiple servers. Coverage includes:
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GNOME Shell is the defining technology of the GNOME 3 user experience. It provides core interface functions like switching to windows and launching applications. GNOME Shell takes advantage of the capabilities of modern graphics hardware and introduces innovative user interface concepts to provide a delightful and easy to use experience.
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