An operating system is the main interface for human beings to interact with computer, use its resources and run their favorite applications or do their professional work. Lots of operating systems are available for a personal computer and end users have their own choice to select one or more out of these systems. Having numerous choices for an operating system selection, and having different editions and distributions of each choice, IT supports are bound to have all these distinct copies of various operating systems' installation resource (CDs/DVDs) in order to fulfill users' requirements. Similarly, forensic experts should also carry these different copies of various operating systems, as the destination computer may require any of them while retrieving the data. These professionals, however, have started to use a usb stick as a replacement of CD/DVD. Using a usb stick to install an operating system is also a solution to reduce installation time by multiple factors. But the existing number of distinct copies of these operating systems force them to carry a number of installation media (CDs, DVDs, or usb sticks), or compel them to remake a usb stick as an installation medium every time for a different operating system. This paper addresses an all-in-one solution to the IT professionals in using a usb hard disk to install every popular operating system. This paper first describes how a usb stick can be an installation medium for different editions and distributions of various popular operating systems, such as Windows, GNU/Linux distributions, and Mac OS X, individually. It also explains an all in one solution to IT support and forensic expert professionals, to use a single external usb hard disk as an installation resource for all the aforementioned operating systems.
With the evolution of External USB hard disk, users started to use it in order to save, transfer and backup data, media, software etc. Besides these known functions, lots of its other functionalities have been hidden to end users. Its benefits and functions are very useful for the IT professionals. It is one of the best substitutes for the CDmVD media installation source for operating systems as well as other software installation resources. Moreover it can also be used as portable OS itself. This article presents methodology and process how a single external USB hard disk can be booted as installation resources for various operating systems and also can be used as portable operating system itself along with other personal data as mentioned above. In short, this paper describes how various operating systems can be installed from and to external USB hard disk.
Software reliability has always been a concern for both software producers and consumers. Because of their role in binary code generation, compilers have significant impact on software performance. Although many works have been conducted on compilers, little is done on their impact on software reliability. Thus, people often face a void of useful knowledge when deciding which compiler to use in developing software to meet a specific reliability target.This paper tries to provide some guidance in users' compiler selection by performing cross-comparison study on popular C compilers: GCC, Intel, Sun, PGI, LLVM using the UNIX based Fedora operating system. We have used SPEC CPU2006 benchmark suite as our test set. Our results show that on average, GCC C compiler is the best while the PGI C compiler is superior to Intel on this operating system platform. And this result is consistent with user experience from our survey feedback.
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