shell function

1. Display the default shell of root, fedora or User1 user on the current system;#!/bin/bash#program#input username, then print USERBASH#2016/08/30 V0.0.1 Rex Frist #注明程序使用的shell, action, date, version Read-p " Please input your username.then,

First, IntroductionRecently, I learned about a very interesting security product called Sanctuary. It prevents any programs from running-These programs are not displayed in the list of software-programs in that table are allowed to run on a

What to learn in this chapter---------- Function Introduction---------- function Definition---------- function uses---------- differentiate return and the Exit---------- Delete a function---------- Precautions1. Introduction function  When you

SelectThe Select loop is used primarily to create menus, the menu items in numerical order are displayed on standard errors, and a PS3 prompt is displayed, waiting for the user's input, the user enters a number in the menu list, executes the

For example, to add the/etc/apache/bin directory to path, there are three methods:1. #PATH = $PATH:/etc/apache/binWith this method, only the current session is valid, meaning that the PATH setting is invalidated whenever the system is logged out or

The Linux shell can be user-defined functions and can be called casually in shell scripts. Here's how to define it, and what to call attention to.I. Defining shell functions (define function)Grammar: [Function] funname [()] { Action

Iii. Command HistoryBash has absorbed a lot of essence from the Korn shell and the C shell, one of which formally holds the feature of a cached copy of the executed command, which we call the "command history" feature.Why should we use the command

Transferred from: http://www.jb51.net/LINUXjishu/150167.htmlThe essential thing in a computer is the operating system. And the development of Linux is very rapid, there is a trend to overtake Microsoft. This article introduces the knowledge of Linux,

#!/bin/bashecho "Current datetime is:" ' Date 'echo "Hello world!"#使用变量: You can use single or double quotation marksYour_name= "Wang"Echo $your _nameEcho ${your_name}Str= ' Shellstudy 'Echo ${str}#只读变量: Cannot change its valueMyurl=

The shell file containsThe shell can also contain external scripts in the following syntax format:. FileNameOrSOURCE filenameFor example, create a two shell script.Script 1:test1.sh url = "Www.baidu.com" Script 2:test2.sh .

This morning a friend suddenly QQ asked, shell programming function why return can only be an integer, how to return the execution of the function and save to a variable. In fact, this problem is very good to solve---only need to seriously

Today, let's look at how to start a process in the application, and then end the process. There is an alternative to implementing this function, which is to use. NET Library System::D iagnostics::P rocess class to complete. In Win32, starting a

Shell IntroductionThe Shell language is familiar to anyone who touches LINUX and is a system user interface that provides an interface for users to interact with the kernel. It receives the command entered by the user and feeds it into the kernel to

Thanks for the http://www.cnblogs.com/strugglesometimes/p/4231359.html of this articleCompilation is a very painful thing, I want to put linux0.12 on the Bochs run up and then you can learn the modules, did not think of various problems.Question 1:1

RSH (remote shell)function Description: remote login shell.syntax:rsh [-dn][-l ][host name or IP address] [Execute instruction]Additional Note:RSH provides a user environment, the shell, so that instructions can be executed on the specified remote

1. Three ways to execute shell scripts:1.1 Make the file executable with executable permissions and run the file directly.1.1.1 Add x permission to a file1.1.2./test.sh1.2 Invoking the command interpreter execution program directly1.2.1 Source

Use the SET command to set various shell options or to list shell variables. A single option sets commonly used attributes. After some options, the-o parameter opens special properties. After some options use +The o parameter will turn off some

1. View the native supported shell types, cat/etc/shells. /bin/bash is the default shell for Linux2.bash Shell function Command memory function history (file address ~/.bash_history) tab command complement function alias command aliases set function

ShellExecute functionShellExecute function prototype and the meaning of the parameters such as the following:function ShellExecute (Hwnd:hwnd; Operation, FileName, Parameters,directory:pchar; Showcmd:integer): HINST; stdcall;HWnd: Used to specify

Impression, always think that as long as mastering the Linux command, natural for writing shell scripts will not be unfamiliar. This is not right. The first half of the sentence is true, it is necessary to master the Linux command, so as to write