unix shell scripting examples

, in the shell script of the usual term loop.At this point, you press CTRL +z to pause it, and then enter BG to go back into the background.In the case of multitasking, if you want to move the task to the foreground, FG is followed by the task number and the task number can be obtained using the jobs command.9. >>, 2>, 2>> : The above-mentioned directional symbols > and >> denote the meaning of substitution and addition, then there are two symbols whi

How to use PHP as a Shell scripting language. 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 well written as S. 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 a

: 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

output on the monitor: Hello, Darrell brogdon! How are are you today?[Dbrogdon@artemis dbrogdon]$ PHP also contains an array of "$ARGV" when writing language as a Dynamic Web page, however, there are some differences: when PHP as a shell scripting language, "$argv [0]" corresponds to the script file name, and when used for dynamic Web page writing, "$argv [1]" Corresponds to the first parameter of the Que

@ artemis dbrogdon] $ scriptname. ph Darrell BrogdonThe Shell script will output on the display:Hello, Darrell Brogdon! How are you today?[Dbrogdon @ artemis dbrogdon] $When PHP is used as a dynamic web page programming language, it also contains the array "$ argv", but there are some differences with this: when PHP is used as the Shell scripting language, "$ ar

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

Tags: exit USB machine $ Example des user created Linu specifiedChapter 23rd using other shellsThe bash shell is the most widely used shell in the Linux distribution. But it's not the only option, and there are other shells you can choose from.23.1 What is dash shellBaidu Encyclopedia said: Dash Shell is a Unix

Bash shell scripting Getting Started (iii) cycleWhat is loop execution?To run a code segment repeatedly multiple timesHow many times to run repeatedly:Number of cycles known beforehandNumber of cycles unknown beforehandThere are entry conditions and exit conditionsRelated commands: For, while, Until,selet,Use for commandRole:Assigns the element in the list to the "variable name" in turn; The loop body is ex

Case judgment in the shellFormat: Case variable name invalue1)Command;;value2)Command;;*)Commond;;EsacIn a case program, you can use a |, meaning, or means in a condition, such as:2|3)Command;;When the variable is 2 or 3 o'clock, the part of the command is executed.Application Examples:[[emailprotected]shell]#cattest7.sh#!/bin/bashread-p "Please enter student's score: "numn1= ' echo $num |sed ' s/[0-9]//g '

Shell Scripting Learning The shell is the command parser that converts the user-entered instruction into a program that the appropriate machine can run.The shell is a program that acts as an interface between a user and a Linux system, allowing the user to enter commands to be executed to the operating system, which c

shell is different from the normal program return value that we understand, and the Shell function return value can only be a numeric value, usually to indicate success or failure of the function, 0 for success, and other values to fail. Therefore, it is inappropriate to return the function execution result with the return value of the function. If you return a string, you get an error message: "Numeric ar