Learn the fundamental concepts of operating systems and the Bash shell.

Bash Programming

In this module, we'll go through the basics of the OS. We'll learn about the core constructs and features of the OS like multitasking, multiprogramming, and GUI. Additionally, we'll learn the Bash shell development tools.

Quick Start with Operating Systems and Bash

## Modes of interpreters

All interpreters have two working modes: non-interactive and interactive.

When we choose the **non-interactive mode**, the interpreter loads the source code file from the disk and executes it. We do not need to type any commands or control the interpreter. It does everything on its own.

When we choose the **interactive mode**, we type each command to the interpreter manually. If the interpreter is integrated with the OS and works in the interactive mode, it is called a **command shell** or shell.

A command shell provides access to the settings and functions of the OS. We can perform the following tasks using it:


* Run programs and system services
* Manage the file system
* Control peripherals and internal devices
* Access the kernel features

# Modes of interpreters

All interpreters have two working modes: non-interactive and interactive.

When we choose the **non-interactive mode**, the interpreter loads the source code file from the disk and executes it. We do not need to type any commands or control the interpreter. It does everything on its own.

When we choose the **interactive mode**, we type each command to the interpreter manually. If the interpreter is integrated with the OS and works in the interactive mode, it is called a **command shell** or shell.

A command shell provides access to the settings and functions of the OS. We can perform the following tasks using it:


* Run programs and system services
* Manage the file system
* Control peripherals and internal devices
* Access the kernel features

Before We Begin

Introduction

Origins of the OS

Operating Systems

Application

Bash Shell

Conclusion

Command Interpreter

Modes of interpreters