TAILIEUCHUNG - The Unix Family of Operating

Some computers have a single-user OS, which means that only one person can use the computer at a time. Many older OSes (such as MS-DOS) can also do only one job at a time. But almost any computer can do a lot mor e if it has a multiuser, multitasking operating system such as Unix. These powerful OSes let many people use the computer at the same time and let each user run several jobs at once. | Preface The Unix Family of Operating Systems An operating system or OS is a set of programs that controls a computer. It controls both hardware things you can touch like keyboards screens and disk drives and software application programs that you run like a word processor . Some computers have a single-user OS which means that only one person can use the computer at a time. Many older OSes such as MS-DOS can also do only one job at a time. But almost any computer can do a lot more if it has a multiuser multitasking operating system such as Unix. These powerful OSes let many people use the computer at the same time and let each user run several jobs at once. Unix was invented more than 30 years ago for scientific and professional users who wanted a very powerful and flexible OS. It s been significantly developed since then. Because Unix was designed for experts it can be a bit overwhelming at first. But after you get the basics from this book you ll start to appreciate some of the reasons to use Unix It comes with a huge number of powerful application programs. You can get many others for free on the Internet. The GNU utilities available from the Free Software Foundation are very popular. You can thus do much more at a much lower cost. Not only are the applications often free but some Unix versions are also free. Linux is a good example. Like the free applications most free Unix versions are of excellent quality. They re maintained by vii 7 January 2002 13 09 viii Preface volunteer programmers who want a powerful OS and are frustrated by the slow bug-ridden OS development at some big software companies. Unlike OSes such as Microsoft Windows and MacOS that are designed for certain types of hardware Unix runs on almost any kind from tiny embedded systems to giant supercomputers. After you read this book you ll be ready to use many kinds of computers without learning a new OS for each one. In general Unix especially without a windowing system is less resource-intensive

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.