Thursday, November 6, 2008

Ubuntu LiveCD

The standard Ubuntu Desktop CD and the Install DVD can both operate as LiveCDs (server and alternate editions do not), so you can run Ubuntu from any CD-ROM drive. In effect, you can carry your operating system with you on a CD. New users can also use the LiveCD to try out Ubuntu to see if they like it. The Ubuntu Desktop CD will run as a LiveCD automatically, and with the Install DVD it is a start-up option. Both run GNOME as the desktop. If you want to use the KDE instead, you would use the Kubuntu CD.

Keep in mind that all the LiveCDs also function as install discs for Ubuntu, providing its limited collection of software on a system, but installing a full-fledged Ubuntu operating system that can be expanded and updated from Ubuntu online repositories. From the LiveCD desktop, double-click the Install icon on the desktop to start the installation. The LiveCD provided by Ubuntu includes a limited set of software packages. On the Ubuntu Desktop CD, you use GNOME for desktop support. Other than these limitations, you’ll have a fully operational Ubuntu desktop. You have the full set of administrative tools, with which you can add users, change configuration settings, and even add software, while the LiveCD is running. When you shut down, the configuration information is lost, including any software you have added. Files and data can be written to removable devices such as USB drives and CD/DVD write discs, letting you save your data during a LiveCD session.

When you start up the Ubuntu Desktop CD, the GNOME desktop is automatically displayed and you are logged in as the live session user. The top panel displays menus and application icons for a Web browser (Firefox) and mail. To the right is a network connection icon for NetworkManager, which you can configure (with a right-click) for wireless access. At the right side of the top panel is a Quit button you can click to shut down your system. It is important to use the Quit button to unmount any removable devices safely.

An icon is displayed for an Examples directory. Click it to access example files for (Productivity), Ogg video and SPX/Ogg sound files (Multimedia), and Gimp XCF and image PNG files (Graphics). files begin with the prefix oo- and include word processing (odt), spreadsheets (xls), presentation (odp), and drawing (odg) files. Check the oo-welcome.odt file for information about Ubuntu and the oo-aboutthese-files.odt file for information about the example files. Also included are PNG image files of the official Ubuntu logos for Ubuntu, Kubuntu, and Edubuntu.

The Computer window, accessible from the Places menu, displays icons for all partitions on your current computer. These will be automatically mounted as read-only, including Windows file systems. The File System icon will let you peruse the configuration files, but these are located on a Read-Only File System (ROFS) that you can access but not change. These folders and files will show a lock emblem on their icons.

You can save files to your home directory, but they are only temporary and will disappear at the end of the session. Copy them to a DVD, USB drive, or other removable device to save them. An Install icon lets you install Ubuntu on your computer, performing a standard installation to your hard drive.

Source of Information : McGraw Hill Ubuntu The Complete Reference

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