What is the function of the command 'echo'?

What is the function of the command 'echo'?

• A. To read user input
• B. To print text to the terminal
• C. To execute scripts
• D. To manage system processes

Answer: (B)

The command 'echo' is primarily used to print text to the terminal. When you use 'echo' followed by a string, it outputs that string to the screen, making it a useful tool for displaying messages, variables, and the results of commands in a shell environment. For example, executing `echo "Hello, World!"` will display "Hello, World!" on the terminal. This functionality is essential for scripting and command-line operations, as it allows users and scripts to communicate information effectively to the terminal interface. The other options focus on different functionalities: reading user input typically involves commands like 'read', executing scripts usually employs commands such as './script.sh' or 'bash script.sh', and managing system processes is a task handled by commands like 'ps', 'top', or 'kill'. Each of these commands serves a distinct purpose, which is why they do not relate to what 'echo' accomplishes.

The command 'echo' is primarily used to print text to the terminal. When you use 'echo' followed by a string, it outputs that string to the screen, making it a useful tool for displaying messages, variables, and the results of commands in a shell environment. For example, executing echo "Hello, World!" will display "Hello, World!" on the terminal. This functionality is essential for scripting and command-line operations, as it allows users and scripts to communicate information effectively to the terminal interface.

The other options focus on different functionalities: reading user input typically involves commands like 'read', executing scripts usually employs commands such as './script.sh' or 'bash script.sh', and managing system processes is a task handled by commands like 'ps', 'top', or 'kill'. Each of these commands serves a distinct purpose, which is why they do not relate to what 'echo' accomplishes.