Shell Command / Script To Write Simple Output On Screen Under Linux and UNIX

To write simple output on the screen in a shell command or script under Linux and Unix, you can use the echo command. The echo command is a built-in command that is used to print text to the standard output (usually the screen).

Here is an example of using the echo command to write simple output on the screen:

echo "Hello, World!"

This will print the message "Hello, World!" on the screen.

You can also use the echo command to print the value of a variable. For example:

name="John"
echo "Hello, $name!"

This will print the message "Hello, John!" on the screen.

You can also use the echo command to print the output of a command. For example:

echo "Today is $(date)."

This will print the current date and time on the screen.