bash amplifier

First, although bash has if_else, you can call the system command. But there are many limitations, such as the lack of multithreading and the absence of libraries. So it is unnecessary to learn bash again using py or ruby. First, although bash has if_else, you can call the system command. But there are many limitations, such as the lack of multithreading and the

Today, I have no intention of discovering the following: $ env-i bash-c CDBash:line 0:cd:home Not set$ env-i bash-c ' echo $HOME ' This shows that Bash only inherits the HOME variable from the environment variable and never initializes it itself? In order to confirm this idea, I went through the source code, and found that in fact, in a

Detailed Anatomy of bash script programmingbackground: bash scripting is a crucial part of Linux learning, and it may be easy to complete a script, but it's not easy to make your own script write. Bash is almost always available for all Linux distributions, so let's take a bash script as an example to discuss how

Examples of common Linux commands and Bash Shell scripts, bashshellSummary The Linux Command isText-based input/outputAccording to the simple functions, loose input, and rigorous output of the program mentioned in the Unix philosophy, various program combinations can have more powerful functions, the main reason for this flexibility is that Linux requires that the input and output of a program must adhere to the file stream format, that is, the text f

The impact of the recent bash vulnerability is really a bit broad, and even Mac systems can't avoid it, and after you've updated the corporate server bash, now it's time to update my own MacBook bash. System: Mac OS X 10.9.4 1. To update bash, install the following components Install command

Write robust Bash scripts many people use shell scripts to complete some simple tasks and become part of their lives. Unfortunately, shell scripts are greatly affected when an exception occurs. It is necessary to minimize such problems when writing scripts. In this article, I will introduce some simple tasks that let bash... write robust Bash scripts. many people

Bash environment configuration file Do you think it's strange that we didn't do anything, but we got a bunch of useful variables as soon as we got into Bash? This is because the system has some environment configuration file cases, so that Bash can directly read these configuration files at startup to plan the bash o

Ubuntudash Shell Https://wiki.ubuntu.com/DashAsBinSh Http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_title.html From Ubuntu 6.10, dash (theDebian almshells) is used by default instead of bash (the GNUBourne-Again Shell ). but Login Shell is still bash. the reason is that dash is faster and more efficient, and it complies with POSIX specifications. Ubuntu runs a lot of shell scripts during star

Bash security vulnerabilities are more serious than heartbleed attacks. RedHat finds a computer software system vulnerability named Shellshock (or Bash Bug), which is no less serious than the "heartbleed" vulnerability in OpenSSL software. It is estimated that this vulnerability may affect the normal operation of more than 50 thousand computer devices. Researchers found the shellshock vulnerability in the

BASH includes: setting variables and using the bash operating environment to build a data stream redirection function pipeline command bash command line is indispensable for host maintenance and management help 1.1 understand bash, shell, which manages computer hardware is actually the kernel of the operating system, t

Article title: Linux programming-11. ShellScript (bash) -- (2) Tutorial example. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. "Hello world" Shell Script According to the traditional program teaching example, this section describes how to write "Hello World" of Shell Script. 　　 　　 　　 -----------------------------

This article mainly introduces the shell scripts used to fix bash vulnerabilities. This article is applicable to common linux server systems, such as CentOS, Debian, Ubuntu, OpenSuSE, and Aliyun, you can find a shell script to fix the bash vulnerability by searching for information on the Internet. I think it is good. I will drag it to my blog to share it with you. Script content: The Code is as follows: