Learn Linux command classification and usage skills

Master the classification and usage skills of Linux commands

Linux, as a free and open operating system, is deeply favored by programmers and system administrators. Compared with operating systems such as Windows, Linux systems are more flexible and powerful, and support rich command line operations. Mastering the classification and usage skills of Linux commands is crucial for people who use Linux systems. This article will introduce the classification of Linux commands and some usage techniques, with specific code examples to help readers better understand and master the operation of the Linux system.

1. Classification of Linux commands

1. File and directory management commands
   Files and directories are the most basic operating objects in the Linux system, so file and directory management commands are also the most basic. One of the commonly used commands. Common file and directory management commands include:
2. ls: List directory contents
3. cd: Switch directories
4. mkdir: Create directory
5. touch: Create empty file
6. mv: Move file or directory
7. cp: Copy a file or directory
8. rm: Delete a file or directory

Example:

ls
cd /path/to/directory
mkdir new_dir
touch new_file.txt
mv old_file.txt new_dir/
cp file.txt backup_file.txt
rm file.txt

2. System Management Commands
   Linux system management commands are used to manage various configurations and operating status of the system, including network configuration, user management, process management, etc. Common system management commands include:
3. ifconfig: View or set network interface configuration
4. ps: Display system process information
5. top: Real-time display of system resource usage
6. useradd: Add new user
7. passwd: Modify user password
8. shutdown: Shut down or restart the system

Example:

ifconfig
ps aux
top
useradd new_user
passwd new_user
shutdown -h now

3. Package management command
   In Linux system, Package management is a very important task as it helps users install, update, and remove software. Common software package management commands include:
4. apt: Commonly used software package management tools in Debian and Ubuntu systems
5. yum: Red Hat, Tools used to manage software packages in systems such as CentOS
6. dpkg: Tools used to install, uninstall and manage software packages in Debian systems
7. rpm: Tools used to manage software packages in Red Hat systems

Example:

sudo apt update
sudo apt install package_name
sudo yum update
sudo yum install package_name
sudo dpkg -i package.deb
sudo rpm -ivh package.rpm

2. Linux command usage skills

1. UsemanCommand to view command help
   In Linux systems, the man command can be used to view the help manual of a command, including command usage, parameters, and examples. For example, you can use man ls to view the help information for the ls command.
2. Use the [Tab] key to automatically complete the command
   When entering a command, you can use the [Tab] key to automatically complete the command, which can save a lot of money time and reduce the possibility of typing errors. For example, entering ls /path/to/di[Tab] will be automatically completed as ls /path/to/directory.
3. Use pipe character|Connect commands
   Pipe character|The output of one command can be used as the input of another command, and the combination of commands can be realized and processing. For example, use ls | grep keyword to find files containing the specified keyword.
4. Use Ctrl C to interrupt the current command
   When executing a command, if you need to interrupt the execution of the current command, you can use the key combination Ctrl C to interrupt the execution of the command .

By mastering the classification and usage skills of Linux commands, combined with specific code examples, readers can have a deeper understanding and mastery of the operation of the Linux system. I hope this article can help readers become more proficient in using Linux systems and better implement related tasks.

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