What is LiveCD?

A live CD can be used for a quick demo or test of Ubuntu. Try Ubuntu without any changes to your machine! Windows or whatever you use normally is unaffected after trying this and then rebooting. 

The standard Ubuntu Cd can be used as a LiveCd as well as an installer. Live mode is the default option when booting from CD. Only some of the non-standard downloads (such as the "Alternate Cd") lack this functionality. Windows users might be familiar with the term 'boot CD' or 'bootable CD' or 'Recovery/Restore Media'. A "LiveCD" is more than that because it gives the option of running a normal desktop environment with all the normal programs and some extras. A LiveCD usually finds your wired internet connection and Firefox should be able to surf the internet into here. 

This guide has screen-shots of the 8.04 and 10.04 Desktop Edition of Ubuntu. However, Lubuntu, Xubuntu, Kubuntu and even unofficial Ubuntu-based distros as well as other versions all tend to have similar screens & menus. 

Most distributions (versions or "distros" of Linux) have this LiveCd functionality on their installer CD, a few have a separate Cd to download. It is rare to find a distro that has no LiveCd session at all. Ubuntu tries to make their LiveCD the easiest to use. Although a LiveCD session is a good way to demo Ubuntu without making changes to a machine, a LiveCD will always be slower than a proper installation to the hard-drive. Cd-drives & Dvd-drives are physically slower than hard drives. 

You can use a persistent image to keep data & settings safe after shut-down. This does go against many reasons for using a LiveCd session (rather than an installation) but it can be useful for multi-user machines, such as offices or in third world education projects.

Reasons for Using a LiveCD Session

LiveCD sessions are good to:

• give a 'demo' session on a machine before installing or upgrading 
  • checks hardware works as expected 
  • check the look & feel of the distro
• repair or preparation for awkward installations 
  • repair/replace/install grub perhaps after (re)installing Windows
  • fix Windows problems on a machine that doesn't have a dual-boot
  • anti-virus problems on a Windows system 
  • data recovery 
  • resizing partitions to give Ubuntu more (or less) room
  • adding a new partition(s) to your hard-drive for other distros or for a new Windows
• preparing a machine for installing Ubuntu, if you are shy of using default or automatic settings or if the hardware is too unique or awkward
• 'showing off' Ubuntu to people on their own machine
• using on a random computer where access is limited
• a familiar desktop environment on an unfamiliar machine 
• safely using a computer which seems to have poor security or lacks privacy. This is particularly good if you have a Usb stick or something to save your data and settings on (see 'persistent image')

clipboard / GLIPPY / Glipper / ClipIt / Diodon / klipper / parcellite Installation

What is Clipboard?
The Clipboard is a temporary storage area for information that you have copied or moved from one place and plan to use somewhere else. You can select text or graphics and then use the Cut or Copy commands to move your selection to the Clipboard, where it will be stored until you use the Paste command to insert it elsewhere. For example, you might want to copy a section of text from a website, and then paste that text into an e‑mail message.

Different OS users different clipboards and for CentOS the name of the software is parcellite.

Parcellite is a stripped down, basic-features-only clipboard manager with a
small memory footprint for those who like simplicity. In GNOME and Xfce the clipboard manager will be started automatically. For other desktops or window managers you should also install a panel with a system tray or notification area if you want to use this package.

Parcellite has both 32 bit and 64 bit packages

CentOS 32 bit : parcellite-0.9-1.el6.rf.i686.rpm
CentOs 64 bit  : parcellite-0.9-1.el6.rf.x86_64.rpm


Download Link :

CentOS 32 bit  : http://apt.sw.be/redhat/el6/en/i386/rpmforge/RPMS/parcellite-0.9-1.el6.rf.i686.rpm

CentOS 64 bit  : http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/RPMS/parcellite-0.9-1.el6.rf.x86_64.rpm


Once downloaded, double click the rpm and install it using package management software or use command line. If using package management, the yum will repositories will be working and so the dependencies will be automatically be installed.

What is centos?

CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by a prominent North American Enterprise Linux vendor.  CentOS conforms fully with the upstream vendor's redistribution policy and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork.)  CentOS is free.

CentOS is developed by a small but growing team of core developers.  In turn the core developers are supported by an active user community including system administrators, network administrators, enterprise users, managers, core Linux contributors and Linux enthusiasts from around the world.

CentOS has numerous advantages over some of the other clone projects including:  an active and growing user community, quickly rebuilt, tested, and QA'ed errata packages, an extensive mirror network, developers who are contactable and responsive, multiple free support avenues including IRC Chat, Mailing Lists, Forums, a dynamic FAQ.

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A very much free OS including updations. The only issue is with installation of some binaries ie. some software's  may be bit tough. Here am trying to workout on installing the different binaries i have come across in my daily needs. Am sharing the news taken from many sites and blogs as a backup for myself as well as for my friends and dear ones. All are free to suggest anything including any new methods or something.