What is Unix

1: What is Unix

The UNIX operating system was born in the late 1960s and is a computer The operating system has multi-tasking and multi-user features, is written in C, and can be modified quickly. It began as a one-man project under the leadership of Ken Thompson at Bell Labs and went on to become the most widely used operating system. Unix is ​​a proprietary operating system. Unix operating system runs on CLI (Command Line Interface), but recently, GUIs have been developed on Unix systems, an operating system that is popular among big businesses in companies and universities.

2: What is LINUX

Linux is an operating system established in 1991 by Linus Torvalds of the University of Helsinki. The name "Linux" comes from the Linux kernel. Initially, Linux was The main function of the system on the computer is to enable applications and users to access the devices on the computer to perform certain functions.

Linux OS processes the instructions issued by the application and sends the results back to the application through Linux OS. It can be installed on different types of computer mobile phones. Currently, many have been released based on the Linux kernel. own operating system version.

Three: UNIX operating system

The UNIX operating system consists of three parts; kernel, shell and program.

Four: Disadvantages of Unix

1. The versions on various machines are slightly different, so there is a lack of consistency.

2.Unix OS is designed for slow computer systems, so fast performance cannot be expected.

3. Unfriendly, concise, inconsistent and non-mnemonic user interface.

4. The Shell interface can be dangerous because input errors can corrupt files.

Five: Directory Structure

All files are grouped together in a directory structure. File systems are arranged in a hierarchical structure, like an inverted tree. The top of the hierarchy is traditionally called root (written as slash /)

In the image above, we see that the main directory "ee51vn" contains two subdirectories ( documents and images) and a file called report.doc.

The full path of the file report.doc is "/home/its/ug1/ee51vn/report.doc"

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