Linux operating system was born on October 5, 1991
but there are many versions. It is currently used by people all over the world. Because it is open source, engineers around the world are constantly contributing code to the Linux operating system to make it more perfect.
Linux operating system is widely used in tablets, switches, routers, video game consoles, desktop computers, handheld games, mainframes and supercomputers. (Recommended learning: linux operation and maintenance)
It should be emphasized that Linux itself is just a kernel, without a graphical interface and various gadgets that can dazzle you.
Therefore, we call those systems developed on the basis of the Linux kernel as Linux distributions.
Debian
Debian is extremely stable, which makes it ideal for use on servers. Debian usually maintains three sets of formal software libraries and one set of non-free software libraries, which has inspired several other distributions (such as Ubuntu and Kali, etc.).
The Debian operating system has derived multiple Linux distributions. It has over 37,500 packages, and the only other distribution that outdoes Debian in this regard is Gentoo. Debian uses apt or aptitude to install and update software.
Gentoo
Like Debian, the Gentoo operating system also contains a large number of software packages. Gentoo does not come in a precompiled form, but needs to be compiled for each system each time. Even the Gentoo community finds Gentoo difficult to install and use; however, it is considered the best place to learn about the inner workings of the Linux operating system.
When it comes to Gentoo, someone always says: "If you want to learn to use a Linux distribution, then learn to use that distribution; if you learn Gentoo, you also learn Linux." Gentoo uses portage to install and updated software.
Ubuntu
Ubuntu is a derivative of Debian and the most popular free operating system today. Ubuntu focuses on its applications in this market and is common on servers, cloud computing, and even some mobile devices running Ubuntu Linux.
Red Hat Enterprise Linux
This is the first Linux distribution for the commercial market. It is available in server versions and supports numerous processor architectures, including x86 and x86_64. Red Hat trains and certifies system administrators through the course Red Hat Certified System Administrator/Red Hat Certified Engineer (RHCSA/RHCE). As far as the global market is concerned, 80% of the total profit comes from support and the other 20% comes from training and certification, but this is not the case in India.
CentOS
CentOS is an enterprise Linux distribution built from the ground up using free source code from Red Hat Enterprise Linux. This refactored version completely removes the registered trademark and a very subtle change in the Binary package.
The above is the detailed content of What are the linux systems?. For more information, please follow other related articles on the PHP Chinese website!

linux设备节点是应用程序和设备驱动程序沟通的一个桥梁;设备节点被创建在“/dev”,是连接内核与用户层的枢纽,相当于硬盘的inode一样的东西,记录了硬件设备的位置和信息。设备节点使用户可以与内核进行硬件的沟通,读写设备以及其他的操作。

区别:1、open是UNIX系统调用函数,而fopen是ANSIC标准中的C语言库函数;2、open的移植性没fopen好;3、fopen只能操纵普通正规文件,而open可以操作普通文件、网络套接字等;4、open无缓冲,fopen有缓冲。

端口映射又称端口转发,是指将外部主机的IP地址的端口映射到Intranet中的一台计算机,当用户访问外网IP的这个端口时,服务器自动将请求映射到对应局域网内部的机器上;可以通过使用动态或固定的公共网络IP路由ADSL宽带路由器来实现。

在linux中,eof是自定义终止符,是“END Of File”的缩写;因为是自定义的终止符,所以eof就不是固定的,可以随意的设置别名,linux中按“ctrl+d”就代表eof,eof一般会配合cat命令用于多行文本输出,指文件末尾。

在linux中,可以利用“rpm -qa pcre”命令判断pcre是否安装;rpm命令专门用于管理各项套件,使用该命令后,若结果中出现pcre的版本信息,则表示pcre已经安装,若没有出现版本信息,则表示没有安装pcre。

在linux中,交叉编译是指在一个平台上生成另一个平台上的可执行代码,即编译源代码的平台和执行源代码编译后程序的平台是两个不同的平台。使用交叉编译的原因:1、目标系统没有能力在其上进行本地编译;2、有能力进行源代码编译的平台与目标平台不同。

在linux中,rpc是远程过程调用的意思,是Reomote Procedure Call的缩写,特指一种隐藏了过程调用时实际通信细节的IPC方法;linux中通过RPC可以充分利用非共享内存的多处理器环境,提高系统资源的利用率。

linux查询mac地址的方法:1、打开系统,在桌面中点击鼠标右键,选择“打开终端”;2、在终端中,执行“ifconfig”命令,查看输出结果,在输出信息第四行中紧跟“ether”单词后的字符串就是mac地址。


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

SublimeText3 Chinese version
Chinese version, very easy to use

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

WebStorm Mac version
Useful JavaScript development tools

Notepad++7.3.1
Easy-to-use and free code editor
