The Complete Practical Docker Guide - How Shell Understands that You Have Entered a Command

This video tutorial explains how Linux commands are recognized and executed by the shell. It covers the importance of the PATH variable, which contains directories where executable files are located, allowing commands to be run directly from the terminal. The tutorial also differentiates between regular and executable files and discusses the structure of commands, including arguments and options. Additionally, it provides guidance on how to get help for specific commands.

What happens when you enter an unrecognized command in the Linux shell?

• The shell automatically corrects the command.

• The shell provides a list of similar commands.

• The command is executed with default settings.

• The shell returns a 'command not found' error.

What is the purpose of the PATH variable in Linux?

• It stores user preferences for the shell.

• It lists directories where executable files are located.

• It contains a history of all executed commands.

• It defines the default text editor for the shell.

How can you view the contents of a directory in Linux?

• By using the 'cd' command.

• By using the 'pwd' command.

• By using the 'ls' command.

• By using the 'echo' command.

Why is the 'ls' command recognized by the Linux shell?

• It is an alias for another command.

• It is a built-in command of the shell.

• It is a command that does not require execution.

• It is an executable file located in a directory listed in the PATH variable.

What does the 'set' command do in the Linux shell?

• It changes the current directory.

• It displays or sets shell variables.

• It lists all available commands.

• It clears the terminal screen.