摘要： In previous chapters we've looked at manipulating data at the file level.In this chapter,we will consider data at the device level.Linux has amazing c 阅读全文

摘要： If we spend any time in the Linux community,we hear many options as to which of many Linux distributions is "best." Often,these discussions get really 阅读全文

摘要： In this chapter we will look at a seemingly trivial detail - our shell.This examination will reveal some of the inner working of the shell and the ter 阅读全文

摘要： There is an joke about a visitor to NewYork City asking a passerby for directions to the city's famous classical music venue(聚集地点，会场): Visitor:Excuse 阅读全文

摘要： As we discussed earlier,the shell maintains a body of （大量）information during our shell session called the environment.Data stored in the environment i 阅读全文

摘要： Modern operating systems are usually multitasking,meaning that they create the illusion（错觉）of doing more than one thing at once by rapidly switching f 阅读全文

摘要： Operating systems in the Unix tradition differ from those in the MS-DOS tradition in that they are not only multitasking systems,but also multi-users 阅读全文

摘要： I often kiddingly describe Unix as "the operating system for people who like to type." Of course,the fact that it even has a command line is a testame 阅读全文

摘要： In this chapter we are going to look at some of the "magic" that occurs on the command line when you press the enter key.While we will examine several 阅读全文

摘要： In this lesson we are going to unleash what may be the coolest feature of the command line.It's called I/O redirection.The "I/O" stands for input/outp 阅读全文