'Linux operating system characteristics'-LINUX-php.cn

Linux is an open source operating system. It is based on the Linux kernel and implements a stable and high-performance operating system environment. The Linux operating system has multi-user and multi-tasking capabilities, can run multiple programs at the same time, and can handle requests from multiple users at the same time.

Linux operating system is composed of multiple different components, including kernel, shell, file system, graphical interface, etc. Among them, the kernel is the core part of the operating system, which is responsible for managing the computer's hardware resources, such as processor, memory, hard disk, etc. Shell is the interface for users to interact with the operating system. Various operations can be performed through Shell commands, such as creating files, copying files, running programs, etc. A file system is a way to store and organize files. It can provide reading, writing and management functions for files. The graphical interface is an intuitive and easy-to-use user interface that users can operate through the mouse and keyboard.

The following are some commonly used Linux command examples:

View files in the current directory: ls
```
ls
```
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Switch directory :cd
```
cd /home/user/documents
```
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Create file: touch
```
touch myfile.txt
```
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Copy file: cp
```
cp myfile.txt backup/myfile.txt
```
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Move File: mv

mv myfile.txt /home/user/documents/myfile.txt

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Delete file: rm
```
rm myfile.txt
```
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Open text editor to edit file:vi
```
vi myfile.txt
```
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Compile and execute C program: gcc
```
gcc myprogram.c -o myprogram ./myprogram
```
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Install software package: apt-get
```
apt-get install packageName
```
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View system information: uname
```
uname -a
```
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These examples are just the tip of the iceberg of the many features of the Linux operating system. Linux has powerful network functions, reliable security and extensive application support, and is widely used in servers, desktops, mobile devices and other fields. By learning and using Linux, users can gain more freedom and flexibility, and gain an in-depth understanding of and mastery of the operating principles of computer systems.

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