learning bash shell

Structure of this article: Bash shell Introduction--variables and variable operations, array-->bash Environment profile analysis What is a shell: Operating system is a set of software to control the entire hardware and management system activities, if the direct use of the operating system, improper oper

applications through the shell (that is, command-line mode), and let these applications invoke the kernel to run the required work。As long as the interface that can manipulate the application can be called the shellNarrow shell-time command-side software such as bash, a generalized shell that includes graphical interf

}Remove the part of value that matches pattern. The condition is that the beginning of value matches pattern.The difference between # And # Is that one is the shortest matching mode and the other is the longest matching mode.(_Cool.gif src = "/uploadfiles/newsphoto/con_cool.gif" border = 0 >$ {Value % pattern}$ {Value % pattern}Similar to (7), except that the value is matched from the end of pattern. The difference between % and % is the same as that between # And #.(9) $ {value/pattern/string}$

This article is the seventh chapter of "Learning the bash Shell" 3rd Edition, "Input/Output and Command-Line Processing. Our goal is to read books thin. Echo and printf are both written. read is used for reading. The format is: ReadVar1 var2... Read multiple parameter values using IFS. If we provide multiple values and the number of parameters, all the e

Today we summarize the basic concepts of bash color, configuration files, variables, arrays and related shell scripting.One. Bash's color display rulesYes, it's a color display, which is the ASCLL code for the color of the call settings, but in the color code, the string function is implemented as follows:\033: Represents the CTRL key;[: Controls the spacing character between the character and the color cod

/*************************************** ******************************* Author: Samson* Date: 08/01/2013 **************************************** ****************************/ BASH Shell script programming learning summary: Variable:(1) environment variables: can be modified;(2) internal variables: provided by the system and cannot be modified;$ #: Get the

As a result of the work, several bash scripts were written in the previous months, primarily for automated testing, packaging, installation packages, and so on. Although compared to C + + programming, to be simple, stupid, but it in the Unix-like system can greatly improve the efficiency of the work. So here's a brief summary of some of the considerations in scripting. 1. Shell Overview The

programs like the C programming language.There are many different shells in Linux, but usually we use Bash (Bourne again shell) for Shell programming because bash is free and easy to use. A shell script file starts with #!/bin/bash