摘要：
1. Operating system: Provide services for programs they run. Typical services: (1) excuting a new program. (2) opening a file, reading a file. (3) allocating a region of memory. (4) getting the current time of day and so on.2. Unix Architecture (1). Operating system in a strict sense (The kernel): 1 阅读全文
posted @ 2014-01-23 14:55
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摘要：
一： Introduction二： Unix Architecture三： Loggin In四： Files And Directories五： Input And Output六： Programs And Process七： Error Handling八： User Identification九： Signals十： Time Values十一： System Calls And Library Functions十二： Summay 阅读全文
posted @ 2014-01-23 14:08
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