The Bash Hackers Wiki bash Use the bash resource to execute scripts using the Bash interpreter. This resource may also use any of the actions and properties that are available to the execute resource. Commands that are executed with this resource are (by their nature) not idempotent, as they are typically unique to the environment in which they are run. Note The bash script resource (which is based on the script resource) is different from the ruby_block resource because Ruby code that is run with this resource is created as a temporary file and executed like other script resources, rather than run inline. Syntax A bash resource block executes scripts using Bash: where cwd specifies the directory from which the command is runcode specifies the command to run The full syntax for all of the properties that are available to the bash resource is: Actions This resource has the following actions: :nothing Prevent a command from running. :run Default. Properties This resource has the following properties: code Ruby Type: String cwd
Bash - Learn X in Y Minutes Bash is a name of the unix shell, which was also distributed as the shell for the GNU operating system and as the default shell on most Linux distros. Nearly all examples below can be a part of a shell script or executed directly in the shell. Read more here. Got a suggestion? Bash Bash (Bourne-again Shell) is a command-line shell/programming language by the GNU Project. Its name is a homaging reference to its predecessor: the long-deprecated Bourne shell. Bash can be run on most UNIX-like operating systems, including GNU/Linux. Invocation Bash behaviour can be altered depending on how it is invoked. Some descriptions of different modes follow. If Bash is spawned by login in a TTY, by an SSH daemon, or similar means, it is considered a login shell. Bash is considered an interactive shell when its standard input and error are connected to a terminal (for example, when run in a terminal emulator), and it is not started with the -c option or non-option arguments (for example, bash script). Note: In Arch /bin/sh (which used to be the Bourne shell executable) is symlinked to /bin/bash. Configuration files See 6.2 Bash Startup Files and DotFiles for a complete description. Note: Login shells can be non-interactive when called with the --login argument. or with a shortcut #!
Bash (Unix shell) GNU replacement for the Bourne shell As a command processor, Bash operates within a text window where users input commands to execute various tasks. It also supports the execution of commands from files, known as shell scripts, facilitating automation. In keeping with Unix shell conventions, Bash incorporates a rich set of features, including: Bash also offers... Bash supports here documents. Brace expansion, also called alternation, is a feature copied from the C shell. $ echo a{p,c,d,b}e ape ace ade abe$ echo {a,b,c}{d,e,f}ad ae af bd be bf cd ce cf Users should not use brace expansions in portable shell scripts, because the Bourne shell does not produce the same output. $ # bash shell$/bin/bash -c 'echo a{p,c,d,b}e'ape ace ade abe$ # A traditional shell does not produce the same output$ /bin/sh -c 'echo a{p,c,d,b}e'a{p,c,d,b}e When brace expansion is combined with wildcards, the braces are expanded first, and then the resulting wildcards are substituted normally. ls *. [edit] Where .
bash(1): GNU Bourne-Again SHell Name bash - GNU Bourne-Again SHell Synopsis bash [options] [file] Copyright Bash is Copyright © 1989-2009 by the Free Software Foundation, Inc. Description Bash is an sh-compatible command language interpreter that executes commands read from the standard input or from a file. Bash is intended to be a conformant implementation of the Shell and Utilities portion of the IEEE POSIX specification (IEEE Standard 1003.1). Options In addition to the single-character shell options documented in the description of the set builtin command, bash interprets the following options when it is invoked: -c string If the -c option is present, then commands are read from string. -i If the -i option is present, the shell is interactive. -l Make bash act as if it had been invoked as a login shell (see INVOCATION below). -r If the -r option is present, the shell becomes restricted (see RESTRICTED SHELL below). -s A list of all double-quoted strings preceded by $ is printed on the standard output. [-+]O [shopt_option] --help
BASH Help - A Bash Tutorial What is the Bash Shell? Bash's Configuration Files Modifying the Bash Shell with the set Command Useful Commands and Features Aliasing Commands Altering the Command Prompt Look and Information CDargs - Shell Bookmarks Basic and Extended Bash Completion Links Links to Bash Scripting Tutorials Contributions Translations What is the Bash Shell? The GNU Bourne-Again SHell (BASH) incorporates features from the C Shell (csh) and the Korn Shell (ksh) and conforms to the POSTIX 2 shell specifications. Bash's Configuration Files Because what I want to say here has already been written I will quote the section entitled "Files used by Bash" from freeunix.dyndns.org's "Customizing your Bash environment" These files are useful for automatically executing commands like: set, alias, unalias, and setting the PS(1-4) variables, which can all be used to modify your bash environment. You can use the source command to apply the changes that you have just made in a configuration file. Set Emacs Mode in Bash Examples: Usage
BashGuide Commands and Arguments -> You are invited to make additions or modifications so long as you can keep them accurate. Please test any code samples you write. All the information here is presented without any warranty or guarantee of accuracy. Use it at your own risk. A new version of this guide is currently being drafted. This guide aims to aid people interested in learning to work with BASH. This guide is targeted at beginning users. If something is unclear to you, you are invited to report this (use BashGuideFeedback, or the #bash channel on irc.freenode.org) so that it may be clarified in this document for future readers. You are invited to contribute to the development of this document by extending it or correcting invalid or incomplete information. The primary maintainer(s) of this document: The guide is also available in PDF format. BASH is an acronym for Bourne Again Shell. Shells are command interpreters. Think of a shell as a way for you to speak to your system. Important!
Bash Bash is the GNU Project's shell. Bash is the Bourne Again SHell. Bash is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh). The improvements offered by Bash include: Command line editingUnlimited size command historyJob ControlShell Functions and AliasesIndexed arrays of unlimited sizeInteger arithmetic in any base from two to sixty-four The maintainer also has a bash page which includes Frequently-Asked-Questions. Downloading Bash Bash can be found on the main GNU ftp server: (via HTTP) and (via FTP). Documentation Documentation for Bash is available online, as is documentation for most GNU software. Mailing lists To ask for help about bash, bash programming or bash shell scripting please use the <help-bash@gnu.org> mailing list. Announcements about Bash and most other GNU software are made on <info-gnu@gnu.org>. Getting involved Development Translating Bash Maintainer Licensing
Bash-it/bash-it: A community bash framework. - GitHub Bash Guide for Beginners 3.2.1. Types of variables As seen in the examples above, shell variables are in uppercase characters by convention. 3.2.1.1. Global variables or environment variables are available in all shells. Below is a typical output: 3.2.1.2. Local variables are only available in the current shell. Below is a diff file made by comparing printenv and set output, after leaving out the functions which are also displayed by the set command: 3.2.1.3. Apart from dividing variables in local and global variables, we can also divide them in categories according to the sort of content the variable contains. String variablesInteger variablesConstant variablesArray variables We'll discuss these types in Chapter 10. 3.2.2. Variables are case sensitive and capitalized by default. To set a variable in the shell, use VARNAME="value" Putting spaces around the equal sign will cause errors. Some examples using upper and lower cases, numbers and spaces: 3.2.3. export VARNAME="value" 3.2.4. 3.2.4.1. Table 3-1. 3.2.4.2. or
BASH Programming - Introduction HOW-TO Next Previous Contents BASH Programming - Introduction HOW-TO by Mike G mikkey at dynamo.com.ar Thu Jul 27 09:36:18 ART 2000 This article intends to help you to start programming basic-intermediate shell scripts. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 13.1 Ways Calling BASH 14.