(a) Introduction to Linux-related content

1.Linux Kernel website: www.kernel.org

2.Linux Major releases:

(1) common in Redhat server (some function charge); (2) Ubuntu graphics interface is good, but the server is seldom used;

(3) CentOS is similar to Redhat, almost identical and free, so this version is recommended in the experiment

3. Open source software: The code of the entire software can be viewed, and the code can be modified according to its own needs.

(1) Common open source software under Linux: Php,mysql,python,apache,nginx (Support more concurrency problem resolution), etc., where php+mysql+apache+linux is a common web development architecture

(2) Features:

<1> freedom to use: Most open source software is free;

Freedom of <2> Research: The source code of the software can be obtained;

Freedom of <3> dissemination and improvement: freedom to disseminate, improve and even sell.

4.Linux Application Areas:

There are two main areas:<1> Linux-based enterprise server;<2> embedded applications

5.Linux differs from Windows

(1) Linux is strictly case-sensitive: Windows DOS commands are not case-sensitive, while the Linux command line (note that this cannot be called Dos,dos for Windows) is strictly case-sensitive;

(2) All content in Linux is saved as a file, including hardware. That is all documents.

(3) Linux does not have the concept of extension, not by extension, but by the right to distinguish, different types of files have different permissions;

(4) Linux does not directly install and run programs under Windows, you need to install the Windows emulator:

Benefits: Viruses and trojans under Windows cannot be run on Linux systems

Cons: Some programs must be developed for Linux again.

6. Advantages of the character interface:

(1) The character interface occupies less system resources;

(2) reduced the likelihood of an error, being attacked.

(a) Introduction to Linux-related content