Shell Command Toolkit

A curated collection of essential shell commands for Linux systems.

Introduction

This repository provides a comprehensive list of common shell commands, organized for easy reference. These commands can help you automate tasks, troubleshoot issues, and manage your Linux system efficiently.

Basic Commands

• Navigation:

      cd <directory>  # Change directory
      cd ..           # Go to parent directory
      pwd            # Print working directory

• File Operations:

      ls              # List files and directories
      mkdir <directory>  # Create a directory
      touch <file>        # Create a file
      rm <file>          # Remove a file
      rm -r <directory>   # Remove a directory recursively
      cp <source> <destination>  # Copy a file or directory
      mv <source> <destination>  # Move a file or directory

• Viewing File Contents:

      cat <file>  # Display the entire file
      head <file>  # Display the first few lines
      tail <file>  # Display the last few lines

Advanced Commands

• Searching and Filtering:

      grep <pattern> <file>  # Search for a pattern in a file
      find <directory> -name "*.txt"  # Find files with a specific extension

• Text Manipulation:

      sed 's/old_text/new_text/g' <file>  # Replace text in a file
      awk '{print $2}' <file>  # Extract specific fields from a file

• Process Management:

      ps aux  # List running processes
      kill <PID>  # Kill a process

• Remote Access:

      ssh <user>@<host>  # Connect to a remote host
      scp <file> <user>@<host>:<destination>  # Copy a file to a remote host

Tips and Tricks

• Use wildcards: * matches any character sequence, ? matches a single character.
• Combine commands with pipes: command1 | command2 sends the output of command1 as input to command2.
• Use redirection: command > file redirects output to a file, command >> file appends output to a file.
• Explore shell scripting: Automate repetitive tasks with scripts.

Contributing

Feel free to contribute to this repository by adding new commands, improving existing ones, or fixing issues.

Happy scripting!