How to Modify a Bash Script to Display Files and Directories Correctly

Learn the essential steps to modify a bash script for correctly displaying files and directories on Linux using simple shell commands.
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How to Modify a Bash Script to Display Files and Directories Correctly

Navigating the Linux filesystem and displaying its contents is a common requirement for many admins and users. By tweaking and refining your bash scripts, you can effectively list files and directories. This guide explains the necessary steps to ensure your bash script accomplishes this accurately.

Understanding ls Command Basics

The primary command to display files and directories in Linux is ls. For a basic listing, you can simply use:

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However, to enhance the output, you might want to add certain options:

-l: List in long format.

-a: Include hidden files starting with ..

-h: Make file sizes human-readable.

-R: Recursively list subdirectories.

Combining these options:

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Creating and Modifying Your Bash Script

Below is a sample bash script to list files and directories under a given directory, including options for long format, hidden files, and human-readable sizes.

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Key Features of the Script:

Argument Check: Ensures a directory is provided.

Directory Validation: Confirms the given argument is a valid directory.

Enhanced ls Output: Lists files in long format, includes hidden files, and shows human-readable sizes.

Making The Script Executable

To run the script, it first needs execution permissions:

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After making it executable, run the script followed by the directory name:

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This command will correctly list all files and directories within the specified directory, including hidden files and extended details.

Conclusion

Modifying a bash script to display files and directories accurately in Linux involves understanding core commands and making use of essential options such as those provided by ls. With the proper tweaks, your bash scripts can become powerful tools for filesystem navigation and management.