bash amplifier

One-click installation of powershell, bash script, and powershellbash in linux Description Currently, powershell in linux is equivalent to pash. I hope you will focus on mono and pash. One-click installation scripts include for centos6, centos7, and ubuntu 14.04 ubuntu 14.10 The installation script is installed using yum or apt. mono is the latest official version. Compile and install the latest version of pash and generate two commands: Mybuild is us

Here is a bash script compilation tutorial written by old American. It is very good. At least I have never touched bash and can understand it!Create a scriptLinux has many different shells, but we usually use Bash (Bourne again shell) for shell programming, because Bash is free and easy to use. So in this article, all

Bash is a Unix shell written for the GNU program. Its name is a series of abbreviations: Bourne-Again SHell-this is a puntion about the Bourne shell (sh) (Bourne again/born again) Complete bash History Review 1. Download the bash-4.2 source code package and modify the source code to re-compile and install it: Wget http://mirrors.ustc.edu.cn/gnu/

1. Check the current version information:Bash-versionecho $BASH _version2, hit 4.3 version of the patch under the TMP directory (for insurance purposes, space at least 100M) create a new bash_upgrade.sh file, and write the following: wget http ://ftp.gnu.org/gnu/bash/bash-4.3.tar.gztar zxf bash-4.3.tar.gz; CD

Total 5th article Before we talked about if. This time we'll talk about another alternative structure--case. Case and if If the condition is used for selection, not a lot of circumstances, if the choice of conditions too much, a series of If,elif, is also drunk. Yes, the case in bash is the same as the switch's position in C. But the usage can be very different. code block Any language has the concept of a block of code, the curly braces in C language

Respect for the original works, Ming: This post for the excellent post integration One, meaning #!/bin/sh refers to this script using/bin/sh to interpret execution, #! is a special notation, followed by the path to the shell that interprets the script. In fact, the first sentence of the #! is the Interpreter program path to the script, the content of the script is interpreted by the interpreter, we can use a variety of interpreters to write the corresponding script. For example,/bin/csh scripts,

GNU Bash incomplete fix Remote Code Execution Vulnerability (CVE-2014-6278) Release date:Updated on: Affected Systems:GNU Bash Description:Bugtraq id: 70166CVE (CAN) ID: CVE-2014-6278 Bash, a Unix shell, was written by Brian fox for the GNU program in 1987. The GNU Bash 4.3 bash43-026 and earlier versions do not proper

Bash remote arbitrary code execution Security Vulnerability (most serious vulnerability) US-CERT is aware that Bash has a security vulnerability that directly affects Unix-based systems (such as Linux and OS X ). This vulnerability causes remote attackers to execute arbitrary code on the affected system. US-CERT recommends that users and administrators review this RedHat security blog. For more details, r

Linux: In bash programming, the circular statement usage 1.if is a single branch statement in the following format: if condition; then statement ..... Fi 2.if... Else is a dual-branch statement in the following format: if condition; then statement .... Else statement .... Fi 3.if... Elif... Elif... Else is a multi-branch statement in the following format: if condition; then statement .... Elif condition; then statement ..... Elif condition; then state

"Programmer under Windows, you really need to learn Linux"Manual: Linux Command Manual (Troy version 2.0)Link: Https://pan.baidu.com/s/1skrVSvV Password: tmf2A bash manual is included:Shell Programming Manual. CHMBaidu Network disk: Http://pan.baidu.com/s/1dFI1UOL-----------------------------cut----------------------------------------------.AsideNot to mention the power and merits of bash. We go directly to

Bash supports the use of functions, where functions appear, and is automatically replaced with function-defined code, which can be reused multiple times after a function definition, greatly reducing the amount of codefunction definition Format:First KindFuncName () {function Body}The second Kindfunction FuncName {functional body}The function has two return values:Data returned as normal:A print statement in a function, such as echo or printExecution r

In Bash, we can use the history command to review, modify, and reuse previous historical commands. Remove the signal mechanism, remove the job control, and remove various parameter calls. Today, we only want to see how to record commands in Bash and how to store historical commands. In Bash, we can use the history command to review, modify, and reuse previous his

Let's take a look at the rules for using spaces in bash:1. No spaces are allowed on both sides of the = sign for assignment operations.2. A space is required between the command and the option.3. The space on both sides of the pipe is optional.Take a look at the various causes of errors due to whitespace:1) The assignment operation has a space at the left of the = signvar = "abc"The resulting error message is:Var:command not foundThis is because when

appears [Ctrl-?] This type of shortcut is due to "?" is a character that needs to be obtained by using the SHIFT key, so this type of shortcut is used by default [ctrl-shift-?] Note that in bash, shortcut keys may be written in octal or hexadecimal form (following the escape character); The shortcut keys in the script file do not always work. In addition, shortcut keys have a rule,Ctrl starts with the shortcut keys are generally for the char

Linux system learning notes: BASH programming uses var (elementelement...) to create array variables. When referencing elements in an array, use $ {var [I]}, I as the subscript, subscript @ to copy the original array, and subscript * to copy the original array, but when double quotation marks are added, it uses the original array as... linux system learning notes: BASH programming using var = (element ...)

High-risk bash vulnerabilities are detected. Be careful with your server! Background: On July 15, September 25, Beijing time, a Linux User got another"Surprise"! The Red Hat security team found a hidden and dangerous security vulnerability in the bash shell widely used in Linux. This vulnerability is called "bash bug" or "shellshock ". This vulnerability allows

A Bash Script: A while loop in the Loop Structure Like other languages, the Bash loop structure also contains the while statement.Basic Structure While condition do loop body done Like the for statement, its loop body is also do... Done structure. We can fold the while statement. While condition; do loop body done It can be further folded into a row While condition; do loop body; done Most

Bash is a shell supported by major Linux distributions. When we landed bash, we didn't do anything, but we were able to invoke a variety of environment variables in bash. This is because a series of configuration files have been defined in the system and the rules for loading them. Below is an example of CentOS. Before that, we need to understand two concepts: th

immediately and will not take effect until the contents of the file are reloaded, and it is always valid for both operationsRevoke alias: Unalias. . BASHRC: Read the command for. BASHRCCommand history:The bash process saves the commands that the user has executed in its session, so that users can repeatedly execute a command through Bash's historical command file to persist previously executed commands, and bash