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72 lines
2.6 KiB
Markdown
Executable File
# The `ls` command
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The `ls` command lets you see the files and directories inside a specific directory *(current working directory by default)*.
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It normally lists the files and directories in ascending alphabetical order.
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### Examples:
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1. To show the files inside your current working directory:
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```
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ls
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```
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2. To show the files and directory inside a specific Directory:
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```
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ls {Directory_Path}
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```
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### Syntax:
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```
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ls [-OPTION] [DIRECTORY_PATH]
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```
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### Interactive training
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In this interactive tutorial, you will learn the different ways to use the `ls` command:
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[The ls command by Tony](https://devdojo.com/tnylea/ls-command)
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### Additional Flags and their Functionalities:
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|**Short Flag** |**Long Flag** |**Description** |
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|:---|:---|:---|
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|`-l`|<center>-</center>|Show results in long format|
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|`-S`|<center>-</center>|Sort results by file size|
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|`-t`|<center>-</center>|Sort results by modification time|
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|`-r`|`--reverse`|Show files and directories in reverse order *(descending alphabetical order)*|
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|`-a`|`--all`|Show all files, including hidden files *(file names which begin with a period `.`)*|
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|`-la`|<center>-</center>|Show long format files and directories including hidden files|
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|`-lh`|<center>-</center>|list long format files and directories with readable size|
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|`-A`|`--almost-all`|Shows all like `-a` but without showing `.`(current working directory) and `..` (parent directory)|
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|`-d`|`--directory`|Instead of listing the files and directories inside the directory, it shows any information about the directory itself, it can be used with `-l` to show long formatted information|
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|`-F`|`--classify`|Appends an indicator character to the end of each listed name, as an example: `/` character is appended after each directory name listed|
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|`-h`|`--human-readable`|like `-l` but displays file size in human-readable unit not in bytes|
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### Setting Persistent Options:
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Customizing command behavior in Linux is easy using the `alias` command. To make these changes permanent, follow these steps:
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1. **Create the Alias**: Define your alias with the desired options. For example, to enhance the `ls` command:
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```bash
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alias ls="ls --color=auto -lh"
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```
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2. **Persistence**: This alias is effective only for the current session. To make it permanent, add the alias to your shell's configuration file:
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- **Bash**: Append the alias to `~/.bashrc`:
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```bash
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echo 'alias ls="ls --color=auto -lh"' >> ~/.bashrc
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source ~/.bashrc
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```
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3. **Verification**: Open a new terminal session, and the `ls` command will display files as configured.
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