An in-depth look at the different categories of Linux commands

Linux system, as an open source operating system, is widely used in various servers and embedded devices. In the Linux system, commands are the bridge between users and the system. Various operations and tasks can be completed through commands. Linux commands can be divided into several different categories, each with their own functions and uses.

1. File command

File command is the most basic and most commonly used type of command in the Linux system. Through file commands, users can create, copy, move, delete and other operations on files.

Sample code:

• Create a file named test.txt: touch test.txt
• Copy a file named file1 to file2: cp file1 file2
• Move a file named file1 to the directory dir: mv file1 dir
• Delete a file named file1: rm file1
• View the contents of a file: cat file1

2 . Directory commands

Directory commands are used to operate directories, including displaying directory contents, creating directories, deleting directories, etc.

Sample code:

• Display the contents of the current directory: ls
• Create a directory named test: mkdir test
• Switch to the test directory: cd test
• Delete the test directory: rmdir test

3. System commands

System commands are used to manage the Linux system itself, including viewing system information, restarting the system, shutting down the system, etc.

Sample code:

• View system information:uname -a
• Restart the system:reboot
• Shut down the system: shutdown -h now

4. Network commands

Network commands are used Manages network connections and communications and plays an important role in network debugging and configuration.

Sample code:

• View network interface information:ifconfig
• View network connectivity: Ping www.baidu.com
• View routing table information: route -n

5. Process command

The process command is used to manage the processes running in the system, including viewing process status, ending processes and other operations.

Sample code:

• View all processes:ps -aux
• End a process: kill -9 PID

6. Permission command

The permission command is used to set the permissions of files and directories and control the user's access to files and directories. access permission.

Sample code:

• Modify the file permissions to read, write and execute: chmod 777 file1
• Modify the directory Permission is read-only: chmod 755 test

These are commonly used command categories in Linux systems and their corresponding sample codes. By learning and mastering these commands, users can better manage and operate Linux systems and improve work efficiency. I hope readers can gain a deeper understanding of Linux commands and flexibly apply them in actual work through the introduction of this article.

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