search
HomeOperation and MaintenanceLinux Operation and MaintenanceHow to check which subdirectories are in the current directory in Linux

In Linux, you can use the ls command to see which subdirectories are in the current directory. Just execute the "ls -a" command directly. It can display all subdirectories and files in the current directory, including hidden files. . The ls command is used to display the contents of the current directory. It can display the file list of the current directory or the file list under the specified path; the syntax is "ls [options] [dirname]", and the parameter "dirname" is used to set the requirements. The directory to be viewed defaults to the current directory.

How to check which subdirectories are in the current directory in Linux

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

In Linux, you can use the ls command to see which subdirectories are in the current directory.

linux ls command introduction

ls command, the abbreviation of list, is the most common directory operation command. Its main function is Display the contents of the current directory.

ls command is used to display the file list of the current directory, and can also be used to display the file list under the specified path.

Syntax:

ls [options] [dirname]
Parameters Description
options parameters used by the ls command.
dirname The directory to be viewed, defaults to the current directory.

Table 1 lists the commonly used options of the ls command and their respective functions.

##- aDisplay all files, including hidden files (files starting with .), which are also listed together. This is one of the most commonly used options. -ADisplay all files, including hidden files, but excludes the . and .. directories. -dOnly lists the directory itself, not the file data within the directory. -f#ls will sort by file name by default. Using the -f option will list the results directly without sorting. -FAdd the file type indicator after the file or directory name, for example, * represents a executable file, / represents a directory, = represents a socket file, | stands for FIFO file. -hDisplay file or directory size in a human-readable way, such as 1KB, 234MB, 2GB, etc. -iDisplay inode node information. -l Use long format to list file and directory information. -nUID and GID are displayed instead of the file user name and group name respectively. -r Output the sorting results in the reverse direction. For example, if the original file names are from small to large, the reverse is from large to small. -RListing together with the contents of the subdirectory is equivalent to displaying all files in the directory. -SSort by file size, not by file name. -tSort by time, not by file name. --color=nevernever means that the color display is not based on the file characteristics. --full-timeOutput in full time mode (including year, month, day, hour, minute)--time={atime,ctime}Output access time or change permission attribute time (ctime), not content change time.
Table 1 Common options and functions of ls command
Options Function
--color=always
--color=auto
always means displaying color, ls adopts this method by default.
auto means to let the system determine whether to give color based on the configuration.
Note that when the ls command does not use any options, only the names of non-hidden files will be displayed by default, and will be sorted by file name, and will be sorted according to the specific type of the file. Colorize file names (blue for directories, white for general files). In addition, if you want to use the ls command to display more content, you need to use the corresponding options in Table 1.

Common examples of Linux ls command

ExampleDescriptionlsList all files in the current directoryls -l column Get detailed information about all files in the current directoryls /List all files in the root directoryls - l /List the detailed information of all files in the root directoryls -lhForm the detailed information of the file in a human understandable way ls -aList all files, including hidden filesls -d dirnameList the information of the folder itself, not the file information under the folderls -ltList file information sorted by file modification timels -lrtList file information in reverse order of file modification timels ./hai*List all files starting with hai under the current path

列出当前目录下文件

ls

How to check which subdirectories are in the current directory in Linux

显示当前目录下文件详细信息

ls -l

How to check which subdirectories are in the current directory in Linux

我们可以看到,我们使用了 ls -l 命令,显示了当前路径下的文件的详细信息,包括文件的权限,文件的用户组,文件大小和时间等信息。

显示所有文件

ls -al ~

total 156
drwxr-x---  4 root root  4096 Sep 24 00:07 .
drwxr-xr-x 23 root root  4096 Sep 22 12:09 ..
-rw-------  1 root root  1474 Sep  4 18:27 anaconda-ks.cfg
-rw-------  1 root root   955 Sep 24 00:08 .bash_history
-rw-r--r--  1 root root    24 Jan  6  2007 .bash_logout
-rw-r--r--  1 root root   191 Jan  6  2007 .bash_profile
-rw-r--r--  1 root root   176 Jan  6  2007 .bashrc
drwx------  3 root root  4096 Sep  5 10:37 .gconf
-rw-r--r--  1 root root 42304 Sep  4 18:26 install.log
-rw-r--r--  1 root root  5661 Sep  4 18:25 install.log.syslog

通过使用 -a,你会看到以 . 为开头的几个文件,以及目录文件 (.)、(..)、.gconf 等等,这些都是隐藏的目录和文件。其中,目录文件名以蓝色显示,一般文件以白色显示。

注意,Linux 系统中,隐藏文件不是为了把文件藏起来不让其他用户找到,而是为了告诉用户这些文件都是重要的系统文件,如非必要,不要乱动!所以,不论是 Linux 还是 Windows 都可以非常简单地査看隐藏文件,只是在 Windows 中绝大多数的病毒和木马都会把自己变成隐藏文件,给用户带来了错觉,以为隐藏文件是为了不让用户发现。

不仅如此,这里的 ls 命令还使用了 -l 选项,因此才显示出了文件的详细信息,此选项显示的这 7 列的含义分别是:

  • 第一列:规定了不同的用户对文件所拥有的权限,具体权限的含义将在后续章节中讲解。

  • 第二列:引用计数,文件的引用计数代表该文件的硬链接个数,而目录的引用计数代表该目录有多少个一级子目录。

  • 第三列:所有者,也就是这个文件属于哪个用户。默认所有者是文件的建立用户。

  • 第四列:所属组,默认所属组是文件建立用户的有效组,一般情况下就是建立用户的所在组。

  • 第五列:大小,默认单位是字节。

  • 第六列:文件修改时间,文件状态修改时间或文件数据修改时间都会更改这个时间,注意这个时间不是文件的创建时间。

  • 第七列:文件名或目录名。

相关推荐:《Linux视频教程

The above is the detailed content of How to check which subdirectories are in the current directory in Linux. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
The 5 Core Components of the Linux Operating SystemThe 5 Core Components of the Linux Operating SystemMay 08, 2025 am 12:08 AM

The five core components of the Linux operating system are: 1. Kernel, 2. System libraries, 3. System tools, 4. System services, 5. File system. These components work together to ensure the stable and efficient operation of the system, and together form a powerful and flexible operating system.

The 5 Essential Elements of Linux: ExplainedThe 5 Essential Elements of Linux: ExplainedMay 07, 2025 am 12:14 AM

The five core elements of Linux are: 1. Kernel, 2. Command line interface, 3. File system, 4. Package management, 5. Community and open source. Together, these elements define the nature and functionality of Linux.

Linux Operations: Security and User ManagementLinux Operations: Security and User ManagementMay 06, 2025 am 12:04 AM

Linux user management and security can be achieved through the following steps: 1. Create users and groups, using commands such as sudouseradd-m-gdevelopers-s/bin/bashjohn. 2. Bulkly create users and set password policies, using the for loop and chpasswd commands. 3. Check and fix common errors, home directory and shell settings. 4. Implement best practices such as strong cryptographic policies, regular audits and the principle of minimum authority. 5. Optimize performance, use sudo and adjust PAM module configuration. Through these methods, users can be effectively managed and system security can be improved.

Linux Operations: File System, Processes, and MoreLinux Operations: File System, Processes, and MoreMay 05, 2025 am 12:16 AM

The core operations of Linux file system and process management include file system management and process control. 1) File system operations include creating, deleting, copying and moving files or directories, using commands such as mkdir, rmdir, cp and mv. 2) Process management involves starting, monitoring and killing processes, using commands such as ./my_script.sh&, top and kill.

Linux Operations: Shell Scripting and AutomationLinux Operations: Shell Scripting and AutomationMay 04, 2025 am 12:15 AM

Shell scripts are powerful tools for automated execution of commands in Linux systems. 1) The shell script executes commands line by line through the interpreter to process variable substitution and conditional judgment. 2) The basic usage includes backup operations, such as using the tar command to back up the directory. 3) Advanced usage involves the use of functions and case statements to manage services. 4) Debugging skills include using set-x to enable debugging mode and set-e to exit when the command fails. 5) Performance optimization is recommended to avoid subshells, use arrays and optimization loops.

Linux Operations: Understanding the Core FunctionalityLinux Operations: Understanding the Core FunctionalityMay 03, 2025 am 12:09 AM

Linux is a Unix-based multi-user, multi-tasking operating system that emphasizes simplicity, modularity and openness. Its core functions include: file system: organized in a tree structure, supports multiple file systems such as ext4, XFS, Btrfs, and use df-T to view file system types. Process management: View the process through the ps command, manage the process using PID, involving priority settings and signal processing. Network configuration: Flexible setting of IP addresses and managing network services, and use sudoipaddradd to configure IP. These features are applied in real-life operations through basic commands and advanced script automation, improving efficiency and reducing errors.

Linux: Entering and Exiting Maintenance ModeLinux: Entering and Exiting Maintenance ModeMay 02, 2025 am 12:01 AM

The methods to enter Linux maintenance mode include: 1. Edit the GRUB configuration file, add "single" or "1" parameters and update the GRUB configuration; 2. Edit the startup parameters in the GRUB menu, add "single" or "1". Exit maintenance mode only requires restarting the system. With these steps, you can quickly enter maintenance mode when needed and exit safely, ensuring system stability and security.

Understanding Linux: The Core Components DefinedUnderstanding Linux: The Core Components DefinedMay 01, 2025 am 12:19 AM

The core components of Linux include kernel, shell, file system, process management and memory management. 1) Kernel management system resources, 2) shell provides user interaction interface, 3) file system supports multiple formats, 4) Process management is implemented through system calls such as fork, and 5) memory management uses virtual memory technology.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools