Squeak by example. Smalltalk By Example.
- Unix Shells by Example.
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- UNIX Shells by Example / Edition 4.
- Unix shells by example.
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Unix Shells Tutorial
Bash means Bourne-again shell. Since projects had to pay to use the Bourne shell, Bash became very popular. Try opening your Mac terminal. That by default is running Bash, the most common shell.
UNIX Shells by Example, 4th Edition
You can set up your system to run any kind of shell, for example I use Fish. You can type anything, and upon pressing the enter key, the shell will interpret your command and try to execute the line you entered. I just made a simple introduction to the basics. The shell provides you with an interface to the UNIX system. It gathers input from you and executes programs based on that input.
When a program finishes executing, it displays that program's output. A shell is an environment in which we can run our commands, programs, and shell scripts. There are different flavors of shells, just as there are different flavors of operating systems.
Each flavor of shell has its own set of recognized commands and functions. While the prompt is displayed, you can type a command.
The shell reads your input after you press Enter. It determines the command you want executed by looking at the first word of your input. A word is an unbroken set of characters. Spaces and tabs separate words.
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You can customize your command prompt using environment variable PS1 explained in Environment tutorial.