• A command is comprised of 2 things.

Command + Arguments

COMMAND:

• Command means the application that we want to run.
• It performs a specific action assigned to a program to perform a specific task.

ARGUMENTS:

• Arguments is nothing but parameters.
• It specify information that the command need in order to run.
• It means it is used to pass specific information to the command when it is executed.
• If you do not specify a parameter the command might assume a default value.

For example:

mkdir hello

Here: mkdir is the command and hello is the argument.