Basic syntax for BASH
The simplest example of--hello world!
About input, output, and error outputs
Rules for variables in BASH (similarities and differences with C language)
Basic Process Control syntax in BASH
Use of
Basic syntax for BASH
The simplest example of--hello world!
About input, output, and error outputs
Rules for variables in BASH (similarities and differences with C language)
Basic Process Control syntax in BASH
Use of
The simplest example of--hello world!
About input, output, and error outputs
Rules for variables in BASH (similarities and differences with C language)
Basic Process Control syntax in BASH
Use of functions
2.1 Simplest example
Linux Shell Bash with special meaning exit code purpose descriptionThe exit command exits the current shell and can terminate the current script execution in a shell script.Common parametersFormat: Exit nExit. Set the exit code to N. (cause the
Shell commonly known as shell (used to distinguish from the kernel), refers to the "user interface to provide users" command parser (software). It is similar to DOS command and later cmd.exe. It receives the user command and then invokes the
Understanding of the Bash environment variable Parsing Vulnerability
1. What are environment variables?Both Windows and Linux programs support environment variables. Generally, environment variables are stored at the beginning of the process memory
In everyday English, the shell can be translated into shells, most of which means a device or structure that can protect the inner core. In computer science, the shell actually refers to a provider that can use the entire computer's resources
Shell types:Sh-Bourne shell CSH or tcsh-C shell Korn-Korn shell bash-GNU Bourne-again shell
1. Simplest ColumnExample #! /Bin/bash # This is a very simple example echo Hello World
Explanation:
In bash, the first line "#! "And later"/bin/bash
1. Linux Scripting Basics
1.1 Basic Introduction to grammar
1.1.1 Start
The program must start with the following line (must be on the first line of the file):
#!/bin/sh
The symbolic #! is used to tell the system that the parameters behind it
Let's take a look at the simple technique for processing command line independent variables, and then look at the basic programming structure of bash.
Receive independent variable
In the sample program in the introductory article, we use the
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