Linux learning Note 1

Basic Linux Operating principles: 1. everything is a file. 2 is composed of a single-functional applet. 3. combine applets to complete complex tasks. 4. avoid interacting with users during execution. 5 basic Linux Operating principles: 1. everything is a file. 2. it is composed of small programs with a single function. 3. combine applets to complete complex tasks. 4. avoid interaction with users during execution. 5. all configuration data is stored in a text file.
Different Linux distributions must be reflected in file names, storage paths, software package management, and default tools.
Switch terminal: Ctrl + Alt + (F1-F6) F7 is the default graphics terminal, to install a graphical interface program is valid. Start the graphics terminal startx @ in CLI for the first time. start the second startx --: 2 @......
Linux system structure:
The source code is specially compiled for this hardware layer. The Linux kernel contains the basic driver functions of various underlying hardware. The function library is a secondary encapsulation of the basic driver functions provided by Linux. Function libraries provide calling interfaces for functional software such as players. You can use shell software (such as bash) to start functional software.