Bash by example, Part 1. Fundamental programming in the Bourne again shell (bash) Daniel RobbinsPublished on March 01, 2000 You might wonder why you ought to learn Bash programming. Well, here are a couple of compelling reasons: You're already running it If you check, you'll probably find that you are running bash right now. You're already using it Not only are you already running bash, but you're actually interacting with bash on a daily basis. Bash confusion Learning bash the wrong way can be a very confusing process. While this may be somewhat disappointing to novices, the standard bash documentation can't be all things to all people, and caters towards those already familiar with shell programming in general. That's where this series comes in. Environment variables Under bash and almost all other shells, the user can define environment variables, which are stored internally as ASCII strings.
The standard way to define an environment variable under bash is: Quoting specifics dirname and basename Command substitution. BASH Programming. 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. It does not intend to be an advanced document (see the title). 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 13.1 Ways Calling BASH 14. Bash Reference Manual. Back to FAQS.ORG This text is a brief description of the features that are present in the Bash shell.
This is Edition 2.5a, last updated 13 November 2001, of The GNU Bash Reference Manual, for Bash, Version 2.05a. Copyright (C) 1997, 1998 Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA Verbatim copying and distribution of this entire article is permitted in any medium, provided this notice is preserved. Bash contains features that appear in other popular shells, and some features that only appear in Bash. Some of the shells that Bash has borrowed concepts from are the Bourne Shell (`sh'), the Korn Shell (`ksh'), and the C-shell (`csh' and its successor, `tcsh'). This manual is meant as a brief introduction to features found in Bash. 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.
Scripting.