Installing Ubuntu 12.10
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Ubuntu Flying Solo
Installing Ubuntu by itself takes up the entire hard disk and writes all files into the /dev/sda1 primary partition. Also, the Ubuntu install creates the /dev/sda2 extended partition and, within it, the /dev/sda5 logical partition that houses the swap area (see the "Hard Drives in Ubuntu" box). The swap area includes the swap file that takes over when working memory is overloaded, although writing to the swap area is noticeably slower than direct access to main memory.
Ubuntu Neighbors
Windows often takes up the entire hard drive instead. If you want to install Ubuntu alongside Windows, you must shrink the Windows partition and completely defrag it, as described in the "Windows and Ubuntu" box. Ubuntu 12.10 then invokes the GRUB 2 bootloader, which boots both systems and can handle new computers supporting Secure Boot.
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