Transcript multipleOS
CS101 Special Lecture Multiple Operating Systems Software • Software is a set of instructions for the computer to follow to accomplish a task. • Operating System = Set of instructions that controls all hardware and software on the computer Four most popular current desktop operating systems • 1 Windows • 2 Macintosh OS X • 3 Linux (We use the Ubuntu version in lab) • 4 Chrome OS (Not the web browser.) Reasons For Multiply OS’s • Security = Move away from herd • Some software only runs in certain OS’s • Can make upgrading OS’s less scary • Access to OS’s specific features Multiple Boot Computer • What is it? – Hardest and riskiest way to have multiple OS’s – You create multiple partitions on your hard drive. – You install different operating systems on different partitions. – Pick out which OS to use what computer starts up (like the computer in lab). Multiple Boot Computer • Pros: – Fastest way to run another operating system. • Good for gaming – Cheap (Ubuntu is free). – Can run less popular operating system on your computer to access the Internet more securely. – Can reuse an old Mac or Windows computer with Ubuntu – Can run Windows only software in a Mac. • Cons: – Need to reboot computer to use other operating system. – May need to buy Windows license. – Partitioning a drive is risky (make sure to have complete backup in place before attempting). Multiple Boot Mac • How is it done? • Putting Windows on a Mac. – Get Windows install disks with license. Run the Apple Boot Camp Assistant program located in the Utilities folder. It will step you through the process of installing Windows. (Warning: Have a complete backup before you partition drive.) • Putting Ubuntu on a Mac. – Create a Ubuntu install CD or Flash Drive (directions on Ubuntu website). Boot off CD or Flash Drive, partition drive, and install Ubuntu (Warning: Have a complete backup before you partition a drive.) Multiple Boot Windows • How is it done? • Putting Ubuntu on a Windows computer using two partitions. – Create a Ubuntu install CD or Flash Drive (directions on Ubuntu website). Boot off CD or Flash Drive and install Ubuntu (Warning: Have a complete backup before you partition a drive.) • Putting Mac on a Windows computer. – Not legal to do. Much Easier Less Risky Way To Have Multiple Boot Ubuntu In Windows • Download and Install Ubuntu as an application in Windows – Installs as a application in Windows • If you do not like just remove program using Add/Remove Programs control panel in Windows. • How do I install Windows as an application in Windows? – Follow the directions here: http://www.ubuntu.com/download/desktop/windows-installer – Pros: • Can use safer operating system when accessing the Internet • Do not need to partition hard drive. • Free – Cons: • Runs a little slower then it would if installed on own partition. • Cannot run Windows and Ubuntu at the same time. Virtual Computers • What is it? – You install software that allows you to create virtual operating systems on your computer. – You can then run multiple operating systems on your computer at the same time. – You can create as many virtual operating systems as you have room on your hard drive. Virtual Computer On A Windows or Mac • How is it done? – First you install the virtual software • Parallels Desktop $80 • VMware Fusion $80 • VirtualBox $Free – Then create new virtual operating systems. – Open and run as many operating systems as your computer is capable. Virtual Computers • Pros: – No need to reboot computer to use other operating systems. – Can use less popular operating system to access Internet for more security. – Do not need to partition hard drive. • Cons: – Slower way to run another operating system. • Not as good for gaming – May have to pay for virtualization software. Easiest Way To Install Ubuntu For Extra Security • Download and Install Virtual Box • Download and create a Ubuntu install CD – Mac or Windows • Run Virtual Box and install Ubuntu as guest OS. • Pros: – – – – Can use safer operating system when accessing the Internet Do not need to partition hard drive. Can access Mac/Windows at same time. Free • Cons: – Runs a little slower then it would if installed on own partition.