shell scripting basics

use it as the first command option. The FS parameter immediately following the-F option is a regular expression or is provided as the next argument. The field separator character can also be set to be specified using the built-in variable FS. Such as:Awk-f ' \ t ' {...} ' files fs= ' [\f\v] ' filesAbove example the value set by the-F option is applied to the first filegroup, and the value specified by FS is applied to the second group. The-v option initialized must be placed before any programs

: This article describes how to use PHP as a Shell script language. For more information about PHP tutorials, see. We all know that PHP is a very good dynamic web page development language (fast speed, short development cycle ......). However, only a few people realize that PHP can also be a good language for writing Shell scripts. When PHP is used as a language for writing

Tags: Ash programming Daquan status Session $ home Directory str ReferenceYou can encapsulate the shell script code in a function so that it can be used more than once anywhere in the script.17.1 Basic Scripting functionsFunction: is a block of script code that can be named and reused anywhere in the code.17.1.1 Creating a functionThere are two types of formats: Name is the function name1)Function name{Comm

Shell Scripting Learning GuideThe following eight points can not be said to be your shell Scripting Learning Guide de all, at least let you write a reliable shell script.1. Specify bashThe first line of the shell script, what shou

Linux Shell Scripting Basics Here we first talk about the shell's grammatical basis, beginning, annotation, variables and environment variables, to do a basic introduction, although not involved in specific things, but lay a good foundation for later learning easy premise.1. Linux Scripting BasicsBasic Introduction to

integer or an arithmetic expression whose value should be greater than or equal to 0.1. Defining arraysIn the Shell, the array is represented by parentheses, and the elements of the array are separated by a "space" symbol.Array name = (value 1 value 2 ...) Value N)Array_Name= (value0 value1 value2 value3) Array_Name= (value0value1value2value3)Array_Name[0]=value0array_name[1]=value1array_name[n]= Valuen #可以不使用连续的下标, and there is no limit to the rang

We all know that PHP is a very good dynamic web page development language (fast speed, short development cycle ......). However, only a few people realize that PHP can also be a good language for writing Shell scripts. When PHP is used as a language for writing Shell scripts, it is not as powerful as Perl or Bash, but he has a good advantage, especially for people who are familiar with PHP but are not famil

Script This article originates from: http://phpuser.com Author: y10k translation (2002-10-15-06:02:00) --English Original: Darrell Brogdon, published in Http://www.phpbuilder.com/columns/darrell20000319.php3) Many people may have wanted to use PHP to write some of the regular mail, such as the program, but there is no way to execute PHP on a regular basis; when I went to Phpbuilder, I found this article, so I want to give you a translation (at the same time make some changes), I hope to be usef

What is a shell script, first of all it is a script, and not as a formal programming language, so to speak is that the shell script is a collection of commands.All custom scripting recommendations are placed in the/usr/local/sbin/directory, and the benefits are easy to manage and maintain, and facilitate later handover to your replacement administrator.The struct

] Then Echo "A is greater than B" Elif [ $a -lt $b ] Then Echo "A is less than B" Else echo "None of the condition met" Fi Operation Result:A is less than BThe IF ... else statement can also be written as a line and run as a command, like this: If test $[2*3] -eq $[1+5]; Then echo ' The numbers is equal! ' ; fi; The IF ... Else statement is also often used in conjunction with the Test command, as follows: NUM1=$[2*3] num2=$[1+5]

As we all know, PHP (as the current mainstream development language) is a very good dynamic web development language (fast, short development cycle ...). ）。 But only a very small number of people realize that PHP (as the current mainstream development language) can also be very good as the language of writing shell scripts, when PHP (as the current mainstream development language) as the language of writing shell