Linux ls Command: List Files, Folders, and Hidden Files

Opening the Terminal and Basic ls Command

• 💻 Open the terminal application to begin using Linux commands.
• 📄 The ls command is used to list files and folders.
• 📂 By default, ls in the home directory shows only folders.
• ➡️ Use cd /etc to navigate to a directory with more files and folders to demonstrate ls effectively.

Advanced ls Command Options

• ℹ️ The ls command can be enhanced with options to display more information.
• 📝 ls -l provides a long listing format, showing permissions, size, and modification timestamps.
• 🤫 ls -a reveals hidden files and folders, which are typically prefixed with a dot (.).
• 🎛️ Combine options like ls -la to see hidden files in a long format.

Enhancing ls Output Readability and Sorting

• 📏 ls -h displays file sizes in a human-readable format (e.g., KB, MB) when used with -l (e.g., ls -lh).
• ⚖️ ls -S sorts files by size, with the largest files listed first.
• 🚀 Combine options for a comprehensive view: ls -lhS shows human-readable sizes, long format, and sorts by size.
• 🔄 ls -r reverses the sort order, displaying items from Z to A or smallest to largest if sorted by size.

Listing Only Directories

• 📁 To list only directories, use the command ls -d */.
• 🎯 This command specifically filters the output to show only directory entries.