What are common Linux commands?

Common Linux Commands

Linux is a powerful operating system that offers a wide range of commands to help users manage their systems effectively. Here are some of the most common Linux commands that you should be familiar with:

Navigation Commands

1. cd (change directory): This command allows you to navigate through the file system and change the current working directory.
   Example: cd /home/user/documents

2. ls (list): This command displays the contents of the current directory.
   Example: ls -l (displays detailed information about the files and directories)

3. pwd (print working directory): This command displays the full path of the current working directory.
   Example: pwd

File Management Commands

1. mkdir (make directory): This command creates a new directory.
   Example: mkdir new_folder

2. rm (remove): This command deletes files or directories.
   Example: rm file.txt (removes a file), rm -r directory (removes a directory and its contents)

3. cp (copy): This command creates a copy of a file or directory.
   Example: cp source_file.txt destination_file.txt

4. mv (move): This command moves or renames a file or directory.
   Example: mv file.txt new_location/file.txt

Process Management Commands

1. ps (process status): This command displays information about running processes.
   Example: ps aux (displays all running processes)

2. top: This command provides a real-time view of the running processes, including CPU and memory usage.
   Example: top

3. kill: This command terminates a running process.
   Example: kill 1234 (terminates the process with ID 1234)

System Information Commands

1. uname: This command displays information about the Linux system, such as the kernel version, operating system, and hardware architecture.
   Example: uname -a (displays detailed system information)

2. df (disk free): This command displays information about the available disk space on the system.
   Example: df -h (displays disk space in human-readable format)

3. free: This command displays information about the system's memory usage.
   Example: free -m (displays memory usage in megabytes)

File Manipulation Commands

1. cat: This command displays the contents of a file or concatenates multiple files.
   Example: cat file.txt

2. grep: This command searches for a specific pattern within a file or the output of a command.
   Example: grep "search_term" file.txt

3. sed (stream editor): This command is used for text manipulation, such as search and replace.
   Example: sed 's/old_text/new_text/g' file.txt

These are just a few examples of the many Linux commands available. As you continue to work with Linux, you will discover more commands and explore their various options and use cases.