Linux is free and open source. It is based on Unix. It is a multi-user and multi-tasking operating system. Anyone can modify its code and pages. , the main purpose is to avoid commercial restrictions, and deploying the server on a Linux system will be more efficient, stable and secure. (Recommended learning: linux operation and maintenance)
Note: UNIX operating system (Eunice) is a powerful multi-user, multi-task operation The system supports multiple processor architectures
Linux was originally designed by Linus Torvalds, a student at the University of Helsinki in Finland, as a personal hobby in 1991. It officially adopted the GPL protocol in 1994.
GPL: General Public License, which ensures that software is free to all users and anyone can modify the software code. It is applicable to most free software foundations.
GUN: It is a software collection system. Many softwares in GUN were collected into Linux, and the current Linux was born.
Linux version branches: Fedora Core: It is one of the many distributions of Linux. It is an open and innovative operating system platform. Its predecessor is Red Hat Linux, which allows anyone to freely modify and redistribute it. It is managed and controlled by the Fedora Foundation. Due to the poor stability of Fedora, it is generally only used for desktop applications.
Debian: Born in 1993, it is jointly maintained by many developers. It is currently the system that most abides by the Linux GPL agreement. Because it is text-based, the operation is cumbersome and the use process is particularly annoying. It is relatively simple. In other words, as a server platform, Debian is known for its stability.
Linux has the program interface and operation method of the Unix system, and also inherits the stability and efficiency of Unix.
It is common for a host with Linux installed on the network to run continuously for more than a year without crashing or shutting down. However, Linux does not have to bear huge copyright fees like ordinary Unix, and it does not It needs to be used on dedicated expensive hardware;
Linux can be executed on a general i386 PC and has high performance. It naturally absorbs the program resources and users accumulated on Unix over the past few decades. In addition, the copyright of GPL allows everyone to freely distribute the source code of Linux and modify the program according to their own needs, making Linux a very popular multi-person multi-tasking, free, stable, high-efficiency, and can be used on i386, etc. , Sparc, Alpha, Mips, PPC and other operating systems that execute on many different computer system platforms.
The above is the detailed content of What is linux like?. For more information, please follow other related articles on the PHP Chinese website!

Maintenance mode plays a key role in Linux system management, helping to repair, upgrade and configuration changes. 1. Enter maintenance mode. You can select it through the GRUB menu or use the command "sudosystemctlisolaterscue.target". 2. In maintenance mode, you can perform file system repair and system update operations. 3. Advanced usage includes tasks such as resetting the root password. 4. Common errors such as not being able to enter maintenance mode or mount the file system, can be fixed by checking the GRUB configuration and using the fsck command.

The timing and reasons for using Linux maintenance mode: 1) When the system starts up, 2) When performing major system updates or upgrades, 3) When performing file system maintenance. Maintenance mode provides a safe and controlled environment, ensuring operational safety and efficiency, reducing impact on users, and enhancing system security.

Indispensable commands in Linux include: 1.ls: list directory contents; 2.cd: change working directory; 3.mkdir: create a new directory; 4.rm: delete file or directory; 5.cp: copy file or directory; 6.mv: move or rename file or directory. These commands help users manage files and systems efficiently by interacting with the kernel.

In Linux, file and directory management uses ls, cd, mkdir, rm, cp, mv commands, and permission management uses chmod, chown, and chgrp commands. 1. File and directory management commands such as ls-l list detailed information, mkdir-p recursively create directories. 2. Permission management commands such as chmod755file set file permissions, chownuserfile changes file owner, and chgrpgroupfile changes file group. These commands are based on file system structure and user and group systems, and operate and control through system calls and metadata.

MaintenanceModeinLinuxisaspecialbootenvironmentforcriticalsystemmaintenancetasks.Itallowsadministratorstoperformtaskslikeresettingpasswords,repairingfilesystems,andrecoveringfrombootfailuresinaminimalenvironment.ToenterMaintenanceMode,interrupttheboo

The core components of Linux include kernel, file system, shell, user and kernel space, device drivers, and performance optimization and best practices. 1) The kernel is the core of the system, managing hardware, memory and processes. 2) The file system organizes data and supports multiple types such as ext4, Btrfs and XFS. 3) Shell is the command center for users to interact with the system and supports scripting. 4) Separate user space from kernel space to ensure system stability. 5) The device driver connects the hardware to the operating system. 6) Performance optimization includes tuning system configuration and following best practices.

The five basic components of the Linux system are: 1. Kernel, 2. System library, 3. System utilities, 4. Graphical user interface, 5. Applications. The kernel manages hardware resources, the system library provides precompiled functions, system utilities are used for system management, the GUI provides visual interaction, and applications use these components to implement functions.

Linux maintenance mode can be entered through the GRUB menu. The specific steps are: 1) Select the kernel in the GRUB menu and press 'e' to edit, 2) Add 'single' or '1' at the end of the 'linux' line, 3) Press Ctrl X to start. Maintenance mode provides a secure environment for tasks such as system repair, password reset and system upgrade.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 English version
Recommended: Win version, supports code prompts!
