Linux Terminal Commands - Quick Reference

#!/bin/bash
# Title: Linux Terminal Commands - Quick Reference

# 1. Navigation & Directory Listing
ls      # List directory contents (files and folders).
cd      # Change the current working directory.
pwd     # Print the full path of the current working directory.

# 2. File & Directory Management
mkdir   # Create a new directory (folder).
touch   # Create an empty file or update file timestamps.
cp      # Copy files or directories from one location to another.
mv      # Move or rename files and directories.
rm      # Remove (delete) files or directories (use -r for folders).

# 3. Content Viewing & Searching
cat     # Concatenate and display the entire content of a file.
grep    # Search for a specific pattern or text within files.
head    # Output the first part (default 10 lines) of a file.

# 4. System Info & Permissions
sudo    # Execute a command with administrative (superuser) privileges.
chmod   # Change the access permissions (read/write/execute) of a file.
top     # Display real-time system resource usage and active processes.
df      # Report the amount of available disk space on file systems.
history # Show a list of previously executed commands in the terminal.