Compiz Fusion is a window manager which uses 3D graphics hardware to create aesthetically brilliant and extremely user friendly desktop effects which is widely popular as well.compiz fusion is installed default in ubuntu 7.10 and ubuntu 8.04.To know which version of the compiz fusion you are using ,simply do the following steps.
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Ubuntu has two ways of categorizing its version.For example Ubuntu 8.04 is also known as Ubuntu Hardy Heron.Likewise Ubuntu 7.10 is called Ubuntu Gutsy Gibbon ,Ubuntu 7.04 is called Ubuntu Feisty Fawn and so on .
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• Goto command-line terminal,applications-->accessories-->terminal and type the following

                       lspci
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Assumed that /media/cdrom0/ is the location of CD/DVD-ROM
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• To mount CD/DVD-ROM

       sudo mount /media/cdrom0/ -o unhide

Assumed that /media/cdrom0/ is the location of CD/DVD-ROM
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• Goto command-line terminal,applications-->accessories-->terminal and type the following

                                  lsusb
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• Goto command-line terminal,applications-->accessories-->terminal and type the following

                               mount -a
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• Goto command-line terminal,applications-->accessories-->terminal and type,

                        mount
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• Goto command-line terminal,applications-->accessories-->terminal and type the following

          df -Th

• Goto applications-->accessories-->terminal and type the following

                            sudo fdisk -l
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