You first install one OS(Windows, for example) on a partition, but leave free space.
Then you install your OS of choice(usually GNU/Linux, but you also could install second windows) on rest of hard drive, on separate partition.
In case of two same-type OS's(windows and windows, or Linux and Linux), you should need no additional configuration, but in case of two different OS's you need to use a boot manager(Bootcamp on macs, grub for everything else).
It might also require manual configuration.
You can have more than one operating system installed on a computer at a time. Dual boot allows you the choose which system you want to use. With dual boot enabled, when you turn on your PC it will give you a choice of operating systems.
many linux distributions you can just download and burn to cd and then boot from cd afterwards and most of them have the dual boot option so you don't need to create one but if you'd like to make one you can use a bootloader like grub or syslinux but most linux distros already have a dual boot option.
dual-boot or multiboot
Boot Camp allows you to install Windows on your Mac and dual boot. Your Mac will look just like a Windows PC when you boot into the Windows partition. You will also have to install Windows Security on that partition to be safe.
boot loader
Set up a dual boot, or create a virtual PC with XP inside of Vista and install game on XP in virtual machine.
You can dual boot anything; as long as they are on different hard drive partitions.
Believe it or not, the drive is not relevant. The hard disk itself does not need any magical setting or capability for you to set up dual-boot. All you need is partitions for your operating system and a bootloader that supports multi-boot (Read: Just about any bootloader other than Windows'.).
You can use the Boot tab of MSConfig to find out if the computer is using a dual boot configuration.
Installing two operating systems on one PC is possible, but it requires that you set up a dual boot system. This means that you can switch between the two operating systems when you boot up your computer, which can be useful if you use different programs on different operating systems. To set up a dual boot system, you need to prepare your computer by partitioning the hard drive and creating separate drive volumes for each operating system. This can be done in Windows using the Disk Management utility, or you can use a third-party partitioning tool. Once the partitions are set up, you can install the operating systems one at a time, ensuring that you boot into the correct partition when you are installing each one. You can also use a third-party tool such as Easy BCD to set up the dual boot system and ensure that the correct operating system is loaded when you start your computer. If you are not comfortable setting up a dual boot system yourself, or if you don't have the technical expertise to do so, you can find websites that offer dual boot installation services. One such website is Microprokey .com, which specializes in dual boot installation and can help you get your dual boot system up and running quickly and easily.
All pcs can run Linux. Specifically, you can download and run Ubuntu, which is Linux based. Any PC can run Ubuntu and/or dual-boot Windows and Ubuntu.
Dual-boot and Multiple-Boot are pretty much synonymous.