linux常用命令简介
    英文回答：
    Linux is a popular operating system that is widely used in the computer industry. It provides a command-line interface, where users can interact with the system by typing commands. In this article, I will introduce some commonly used Linux commands.
    1. ls: This command is used to list the files and directories in the current directory. For example, if I type "ls" in the command line, it will display a list of all the files and directories in the current directory.
    2. cd: This command is used to change the current directory. For example, if I want to go to the "Documents" directory, I can type "cd Documents" in the command line.
    3. mkdir: This command is used to create a new directory. For example, if I want to create a directory called "Photos", I can type "mkdir Photos" in the command line.
    4. rm: This command is used to remove files and directories. For example, if I want to delete a file called "", I can type "" in the command line.
    5. cp: This command is used to copy files and directories. For example, if I want to make a copy of a file called "report.doc" in the current directory, I can type "cp report.doc report_copy.doc" in the command line.
    6. mv: This command is used to move or rename files and directories. For example, if I want to move a file called "" to the "Documents" directory, I can type " " in the command line. If I want to rename the file, I can type " ".
    7. grep: This command is used to search for a specific pattern in a file. For example, if I want to search for the word "hello" in a file called "", I can type "grep " in the command line.
    8. chmod: This command is used to change the permissions of a file or directory. For exa
mple, if I want to give read, write, and execute permissions to a file called "script.sh", I can type "chmod 777 script.sh" in the command line.
    9. man: This command is used to display the manual pages of a command. For example, if I want to know more about the "ls" command, I can type "man ls" in the command line.
    10. sudo: This command is used to execute a command with administrative privileges. For example, if I want to install a software package, I can use the "sudo" command to run the installation command as an administrator.
    中文回答：
    Linux是一个广泛应用于计算机行业的流行操作系统。它提供了一个命令行界面，用户可以通过输入命令与系统进行交互。在本文中，我将介绍一些常用的Linux命令。
    1. ls，该命令用于列出当前目录中的文件和目录。例如，如果我在命令行中输入"ls"，它将显示当前目录中所有文件和目录的列表。
linux删除子目录命令
    2. cd，该命令用于更改当前目录。例如，如果我想进入"Documents"目录，可以在命令行中输入"cd Documents"。
    3. mkdir，该命令用于创建新目录。例如，如果我想创建一个名为"Photos"的目录，可以在命令行中输入"mkdir Photos"。
    4. rm，该命令用于删除文件和目录。例如，如果我想删除一个名为""的文件，可以在命令行中输入""。
    5. cp，该命令用于复制文件和目录。例如，如果我想在当前目录中复制一个名为"report.doc"的文件，可以在命令行中输入"cp report.doc report_copy.doc"。
    6. mv，该命令用于移动或重命名文件和目录。例如，如果我想将一个名为""的文件移动到"Documents"目录中，可以在命令行中输入" "。如果我想重命名文件，可以输入" "。
    7. grep，该命令用于在文件中搜索特定的模式。例如，如果我想在名为""的文件中搜索单词"hello"，可以在命令行中输入"grep "。
    8. chmod，该命令用于更改文件或目录的权限。例如，如果我想给一个名为"script.sh"的文件赋予读、写和执行权限，可以在命令行中输入"chmod 777 script.sh"。
    9. man，该命令用于显示命令的手册页。例如，如果我想了解更多关于"ls"命令的信息，可以在命令行中输入"man ls"。
    10. sudo，该命令用于以管理员权限执行命令。例如，如果我想安装一个软件包，可以使用"sudo"命令以管理员身份运行安装命令。

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