What is Linux command?

A Linux command is a text-based instruction provided by a user to the Linux operating system to perform a specific task or operation. These commands are typically entered into a command-line interface (CLI), also known as a terminal or shell, and are executed by the Linux kernel or the underlying shell program.

Linux commands are case-sensitive, meaning that uppercase and lowercase letters are treated differently. Each command consists of a command name followed by optional arguments and options, often separated by spaces. Here's a basic structure of a Linux command:

Command: The name of the command that specifies what action to perform. For example, ls is a command used to list files in a directory.

Options (Flags): Optional modifiers that modify the behavior of the command. Options are typically preceded by a hyphen or double hyphen. For example, -l might be an option to display a long listing format when using the ls command.

Arguments: Additional information or parameters that the command requires to carry out its task. Arguments can be filenames, directories, or any other data needed by the command. For example, if you want to list files in a specific directory, you would provide the directory name as an argument like ls /path/to/directory.

Common Linux commands include

ls: Lists files and directories in the current directory.

cd: Changes the current working directory.

pwd: Prints the current working directory.

mkdir: Creates a new directory.

rm: Removes files or directories.

cp: Copies files or directories.

mv: Moves or renames files or directories.

cat: Displays the contents of a file.