Bash Guide for Beginners. A Sample .bashrc File. The ~/.bashrc file determines the behavior of interactive shells.
A good look at this file can lead to a better understanding of Bash. Emmanuel Rouat contributed the following very elaborate .bashrc file, written for a Linux system. He welcomes reader feedback on it. Study the file carefully, and feel free to reuse code snippets and functions from it in your own .bashrc file or even in your scripts. Bash commands - Linux MAN Pages. Bash by example, Part 2. Let's start with a brief tip on handling command-line arguments, and then look at bash's basic programming constructs.
Accepting arguments In the sample program in the introductory article, we used the environment variable "$1", which referred to the first command-line argument. Similarly, you can use "$2", "$3", etc. to refer to the second and third arguments passed to your script. Here's an example: #! Bash by example, Part 1. 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. Even if you changed your default shell, bash is probably still running somewhere on your system, because it's the standard Linux shell and is used for a variety of purposes. BASH - GNU Project. 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). It is intended to conform to the IEEE POSIX P1003.2/ISO 9945.2 Shell and Tools standard. It offers functional improvements over sh for both programming and interactive use. In addition, most sh scripts can be run by Bash without modification.