bash shopt

following command: $ ^nm^nam^ This will replace nm with nam in the uname command. Cool, right? It can not only correct the typos, but also run commands. View the following. Use this technique when you enter an error in a command. Note that it only applies to Bash shell. Additional tips: Have you ever wondered how to automatically correct spelling errors when using the cd command? No? It doesn't matter! The following tips explain how to do this. This

pattern is followed by a /, only directories and subdirectories match. A shell script for testing and learning globstar is written as follows: #! /Bin/bashfunction show(){ for i in ** do echo $i done} cd /root/jay/echo "------------------------"echo "disable globstar option:"# globstar is disabled by defaultshopt -u globstarshowecho "------------------------"echo "enable globstar option:"shopt -s glob

When you are using some commands, such as: LS, git, just met some requirements is to easily traverse all the directories and files, and then after the search, finally found a "magic" wildcard "* *" (two asterisks), after setting the bash globstar option, * * You can match any current directory (including subdirectories) and the files in it. So, to understand the Globstar this option, when not set Globstar, * * Wildcard function and * is the same, and

, command, compgen, complete, continue, declare, dirs, disown, Echo, enable,Eval, exec, exit, export, FC, FG, getopts, hash, help, history, jobs, kill, let, local, logout, popd, printf, pushd, PWD, read,Readonly, return, set, shift, shopt, source, suspend, test, times, trap, type, typeset, ulimit, umask, unalias, unset, wait-BashBuilt-in commands, see Bash (1) Or use the enable command to list internal com

Calculates each parameter in a mathematical expression Local Creating a scoped variable in a function Logout Exit Shell Login popd Delete records from the directory stack Printf displaying text using a formatted string pushd Add a directory to the directory stack Pwd Displays the path name of the current working directory Read Reads a row of data from stdin a

Man CD---cannot be queried, so it prompts Bash's built-in commands. Alias BG bind break builtin Caller CD command Compgen complete compopt continue declare dirs disown echo enable eval exec Exit export false FC FG Getopts hash help history jobs kill let local logout mapfile popd printf pushd pwd Read ReadOnly r Eturn Set shift shopt source suspend test times trap True Type typeset ulimit umask unalias unset wait -

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 functions 2.1 Simplest example of--hello world!Almost all of the first examples of programming books to readers are t

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 of--hello world!Almost all of the first examples of programming books to readers are the Hello World program, so let's start with this example today to learn more

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 functions 2.1 Simplest example of--hello world!Almost all of the first examples of programming books to readers are t

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 space as value strings. When you execute a program, you can specify the environment variables to pass information to the program to be executed. On a Windows platform dominated by GUI, generally, users seld

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 appropriate application.At the same time, the shell is a programming language. As a command language, it interactively interprets and executes commands entered by the user, or automatically interprets and executes a predetermined sequence of commands. The sh

Some basic Bash ProblemsSome basic Bash ProblemsHere we will introduce some issues before and after bash is started, as well as some basic issues that need to be paid attention to when using bash.1. Bash IntroductionBash is a Shell program. It is the default Shell program in

https://www.zhihu.com/question/21418449Mort | Zsh vs. Bash: Incomplete contrast resolution (1) 2014-10-07BdpqlxzWhat's the difference between zsh and bash?A lot of people have written about "why zsh is better than bash", "Why zsh is better than Shell", the tutorial on how to configure zsh or toss various oh-my-zsh themes is a big basket, but rarely see zsh and

Recently there has been a "destructive level" vulnerability--bash software security vulnerabilities. The loophole was discovered by French gnu/linux enthusiasts Stéphane Chazelas. Subsequently, the United States Computer Emergency Response Center (us-cert), Red Hat and a number of companies engaged in safety in Wednesday (Beijing time September 24) issued a warning. Details of this vulnerability are available in the U.S. government's two disclosure of

Read Catalogue First, everything is a string Two, references and metacharacters Three, where does the string come from, where to go Four, plus a little bit of definition, you can push to export the entire Bash scripting language syntax V. Input/Output redirection Vi. The aesthetics of the Bash scripting language: Boulevard to Jane Summarize: I confess that I once again

First, compile bash to implement the syslog logging function of Bash 1. This paper will realize the function of history record to syslog log through bash software, and it can be transferred to the remote log centralized server in real-time, which can realize the audit function of operation logs.Operating system version: CentOS 6.5 x642. Install 6.5 corresponding

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 "indicates that the file is a bash