09 2017 档案

software package management
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
posted @ 2017-09-28 16:46 kgcqw 阅读(238) 评论(0) 推荐(0)
custom shell prompt
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
posted @ 2017-09-27 11:26 kgcqw 阅读(260) 评论(0) 推荐(0)
vi profile
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
posted @ 2017-09-25 20:17 kgcqw 阅读(1020) 评论(0) 推荐(0)
shell environment
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
posted @ 2017-09-25 20:16 kgcqw 阅读(188) 评论(0) 推荐(0)
Process
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
posted @ 2017-09-21 21:29 kgcqw 阅读(1157) 评论(0) 推荐(0)
limits of authority
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
posted @ 2017-09-20 10:13 kgcqw 阅读(480) 评论(0) 推荐(0)
Keyboard advanced operating skills
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
posted @ 2017-09-18 13:46 kgcqw 阅读(165) 评论(0) 推荐(0)
See the world from the eyes of shell
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
posted @ 2017-09-17 11:25 kgcqw 阅读(159) 评论(0) 推荐(0)
Redirect
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
posted @ 2017-09-15 21:09 kgcqw 阅读(592) 评论(0) 推荐(0)
Use commands
摘要：Up to this point,we have seen a series of mysterious commands,each with its own mysterious options and arguments.In this chapter,we will attempt(试图) t 阅读全文
posted @ 2017-09-14 15:57 kgcqw 阅读(198) 评论(0) 推荐(0)
operate files and directories
摘要：At this point,we are ready for some real work!This chapter will introduce the following commands: cp:Copy files and directories mv:move/rename files a 阅读全文
posted @ 2017-09-13 22:41 kgcqw 阅读(224) 评论(0) 推荐(0)
Explore operating system
摘要：Now that we know how to move around(equal nagtive) the file system,it's time for a guided tour of our Linux system.Before we start however,we're going 阅读全文
posted @ 2017-09-12 21:42 kgcqw 阅读(338) 评论(0) 推荐(0)
how to navigate(跳转)the file system
摘要：The first thing we need to learn to do (desides just typing) is how to navigate the file system on our Linux system.In this chapter we will introduce 阅读全文
posted @ 2017-09-09 23:57 kgcqw 阅读(178) 评论(0) 推荐(0)
what is shell
摘要：shell When we say command line,we are really reffering to the shell.Shell is a programm that takes keyboard commands and passes them to the operating 阅读全文
posted @ 2017-09-09 20:49 kgcqw 阅读(262) 评论(0) 推荐(0)
Are you a teacher
摘要：Robert:I am a new student.My name is Robert Sophie:Nice to meet you.My name is Sophie Robert:Are you french? Sophie:Yes,I am.Are you french ...too? Ro 阅读全文
posted @ 2017-09-07 11:29 kgcqw 阅读(328) 评论(0) 推荐(0)
nice to meet you
摘要：Good morning Good morning , Mr Black This is SuSan,......a new student ,she is a French SuSan,this is Hans,he's German Nice to meet you,SuSan. ...This 阅读全文
posted @ 2017-09-07 10:48 kgcqw 阅读(280) 评论(0) 推荐(0)
Sorry,Sir!
摘要：My coat and my umbrella ,please!Here it is my ticket. Thank you,sir! Number 5. Here's your coat and your umbrella. This is not my umbrella. Sorry,sir. 阅读全文
posted @ 2017-09-04 11:03 kgcqw 阅读(100) 评论(0) 推荐(0)
Excuse me!
摘要：Excuse me! Yes? Is this your handbag? Pardon? Is this your handbag? Yes,it is.Thank you very much! 阅读全文
posted @ 2017-09-04 10:58 kgcqw 阅读(89) 评论(0) 推荐(0)
bash脚本编程之五 字符串测试及for循环
摘要：整数测试： -le:小于等于 -lt:小于 -ge:大于等于 -gt:大于 -eq:等于 -ne:不等于 字符测试： ==：测试是否相等，相等为真，不等为假 !=:测试是否不等，不等为真，等为假 -n string:测试字符串是否为空，空则真，不空则假 -z string:测试指定字符串是否不空，不 阅读全文
posted @ 2017-09-04 10:56 kgcqw 阅读(222) 评论(0) 推荐(0)
vim编辑器
摘要：vi:Visual Interface vim:VI improved 全屏编辑器，模式化编辑器 vim模式： 编辑模式（命令模式） 输入模式 末行模式 # vim /path/to/somefile 如果存在：打开某文件 如果不存在：新建文件 vim +#:打开文件，并定位于第#行 vim +:打 阅读全文
posted @ 2017-09-03 23:23 kgcqw 阅读(153) 评论(0) 推荐(0)
_sed命令
摘要：三大文本处理工具：grep,sed(流编辑器)，awk(报告文本生成器) sed基本用法：sed是一种流编辑器，它是文本处理中非常中的工具，能够完美的配合正则表达式使用，功能不同凡响。处理时，把当前处理的行存储在临时缓冲区中，称为“模式空间”（pattern space），接着用sed命令处理缓冲区 阅读全文
posted @ 2017-09-01 13:24 kgcqw 阅读(244) 评论(0) 推荐(0)